187 Selinux Jobs - Page 4

We are seeking a skilled Linux Server Engineer to manage, maintain, and optimize our Linux-based server infrastructure. The role involves deploying, configuring, monitoring, and troubleshooting Linux systems to ensure maximum availability, security, and performance. Key Responsibilities Install, configure, and maintain Linux servers (CentOS, Ubuntu, Red Hat, etc.) in physical and virtual environments. Perform server administration tasks including user management, permissions, and security hardening. Manage services such as Apache/Nginx, MySQL/MariaDB, PHP, DNS, FTP, SSH, and mail servers. Monitor system performance and resource utilization, applying performance tuning where necessary. Handle patch management, updates, and backup/recovery operations. Implement security measures including firewalls, SELinux, and intrusion detection systems. Troubleshoot hardware, OS, and application issues efficiently to minimize downtime. Work with virtualization technologies (VMware, Proxmox, KVM) and cloud platforms (AWS, Azure). Configure and manage control panels like WHM/cPanel, Plesk, or Webmin. Automate tasks using Bash, Python, or Ansible scripts. Maintain documentation for configurations, processes, and troubleshooting procedures. Collaborate with development and IT teams to ensure smooth deployment of applications. Required Skills & Qualifications Strong experience with Linux server administration (Red Hat, CentOS, Ubuntu). Proficiency in command-line operations and shell scripting. Knowledge of TCP/IP networking, firewalls, DNS, and VPNs. Experience with monitoring tools (Nagios, Zabbix, Grafana, Prometheus). Familiarity with control panels (cPanel/WHM, Plesk) and hosting environments. Understanding of containerization (Docker, Kubernetes) and CI/CD tools is an advantage. Problem-solving and analytical skills with attention to detail. Ability to work independently and within a team. Job Types: Full-time, Permanent, Fresher Pay: ₹10,000.08 - ₹18,000.00 per month Work Location: In person

About The Role We are seeking a skilled Linux System Administrator with strong hands-on experience in RHEL, Ubuntu, Oracle Linux, and SUSE. The ideal candidate will be responsible for installing, configuring, patching, hardening, tuning, and maintaining Linux systems while ensuring high availability, security, and optimal performance. Key Responsibilities Linux Administration : Install, configure, patch, harden, and tune systems on RHEL, Ubuntu, Oracle Linux, and SUSE. Manage system upgrades and security patches to maintain compliance and stability. Automation & Scripting Develop and maintain automation scripts in Bash, sh, or ksh. Create health check and monitoring scripts to proactively identify and resolve issues. Networking Work with networking fundamentals including TCP/IP, DNS, DHCP, routing, VLANs. Troubleshoot network issues using tools such as netstat, traceroute, and tcpdump. Storage Management Configure and manage LVM, RAID, NFS, SAN, iSCSI, and disk partitions. Monitor and optimize storage performance. User & Permission Management Manage users, groups, sudoers configuration, PAM, and file/directory permissions. System Monitoring & Troubleshooting Utilize tools like top, htop, iostat, vmstat, and journalctl for performance analysis. Perform detailed log analysis to identify root causes and resolve incidents. Security Implement and maintain security best practices, including SELinux, firewalld/iptables, SSH hardening. Conduct vulnerability remediation and compliance checks. Virtualization & Containers Support virtualized environments (KVM, VMware) and have basic familiarity with Docker. Collaboration & Documentation Work closely with cross-functional technical teams to deliver solutions. Document processes, configurations, and operational runbooks clearly and Excellence : Balance patching schedules, KTLO (Keep The Lights On) activities, and project work effectively. Required Skills & Qualifications 3+ years of experience in Linux system administration across multiple distributions. Strong knowledge of shell scripting (Bash, sh, ksh). Solid understanding of networking protocols and troubleshooting tools. Experience in storage technologies (LVM, RAID, NFS, SAN, iSCSI). Proven troubleshooting skills for performance, network, and system issues. Familiarity with virtualization and container technologies. Strong documentation and communication skills. Ability to work in a fast-paced environment with minimal supervision. Good To Have Knowledge of configuration management tools (Ansible, Puppet, Chef). Exposure to cloud platforms (AWS, Azure, GCP). Experience with monitoring tools (Nagios, Zabbix, Prometheus). (ref:hirist.tech)

Software Department Ahmedabad, Gujarat, India Full Time No of Position: 2 Experience: 3-5 Years Technical Skills Strong understanding of the Android platform and AOSP development. Experience with low-level system programming. Familiarity with Android Architecture and System Services. Experience with Android platform concepts like HAL Development, System Services, Android Boot, Fast Boot, etc. Android OS modifications, HAL interface definition language (C++ and Java) Working experience with Android Automotive OS or Infotainment. Experience with SELinux Policies Android, JNI, and Android application development Debug and troubleshoot issues with the AOSP platform. Ensure the security and stability of the AOSP platform. Design and development of Linux device driver with hands-on experience on the Linux platform designing and implementing drivers for various interfaces like I2C, SPI, Display, camera etc. Hands-on experience in the development of low-level driver software for the Linux operating system. Hands-on experience in boot loaders, and UBoot for Linux. Strong in Operating systems concepts - scheduling, memory management and device driver development in Linux/RTOS Experience with device driver frameworks and Linux kernel APIs. Experience in C/C++ with a deep understanding of Object-Oriented Analysis, Design, and Programming. Collaborate with Architecture, Hardware Design, and cross-functional teams. Prior experience in low-level debugging using a JTAG debugger, and oscilloscopes, logic analyzers, etc Non-Technical Skills Strong analytical and problem-solving skills -Excellent verbal and written communication skills -Self-managed and able to learn and adapt -Eager to take on new challenging work Apply Now

Business Unit: Cubic Corporation Company Details: When you join Cubic, you become part of a company that creates and delivers technology solutions in transportation to make people’s lives easier by simplifying their daily journeys, and defense capabilities to help promote mission success and safety for those who serve their nation. Led by our talented teams around the world, Cubic is committed to solving global issues through innovation and service to our customers and partners. We have a top-tier portfolio of businesses, including Cubic Transportation Systems (CTS) and Cubic Defense (CD). Explore more on Cubic.com. Job Details: Job Summary : We’re looking for a Senior Systems Administrator who can blend strong technical know-how with a deep understanding of Linux and Azure environments to support and scale our growing infrastructure needs. Work Shift: 24x7 Rotational Experience: 5+ Years Primary Skills: Linux, Azure, Production Systems Secondary Skills: Windows Server, VMware Responsibilities : 🔹 Azure Administration Design, deploy, and manage resources in Azure using ARM templates and Terraform. Implement secure, scalable Azure environments with IAM and networking (VNets, NSGs, Load Balancers, Gateways). Monitor and optimize resources using Azure Monitor, Log Analytics, and Application Insights. Drive cost efficiency, disaster recovery planning, and resource utilization. Collaborate on cloud migrations, vulnerability remediation, and system modernization. Certification such as Azure Administrator Associate or Solutions Architect Expert is a huge plus! 🔹 Linux Administration (CentOS/Red Hat) Administer and maintain production-grade Linux servers, perform OS patching, tuning, and secure configurations (SELinux, iptables, etc.). Manage storage using LVM, configure NFS/SMB, and automate tasks via shell scripting or tools like Ansible/Chef. Support open-source tools like Nginx, Apache, SFTP/FTP, and assist in performance tuning and capacity planning. Troubleshoot system issues and work with hardware vendors when needed. 🔹 Windows + VMware (Secondary Skillset) Manage Windows Server environments alongside Hyper-V/VMware virtual infrastructure. Ensure backup, recovery, and business continuity measures are in place. Contribute to identity access management across hybrid environments. Minimum Job Requirements: Bachelor's degree, or equivalent years of experience in lieu of a degree. Five (5)+ years of hands-on experience in systems administration, with a focus on Azure and Linux. Proven expertise in enterprise IT environments, system performance, and infrastructure management. Ability to work in a rotational 24x7 support model. You bring a solution-driven mindset, stay updated with tech trends, and thrive in a collaborative, high-stakes environment. Worker Type: Employee

About The Company TSC Redefines Connectivity with Innovation and IntelligenceDriving the next level of intelligence powered by Cloud, Mobility, Internet of Things, Collaboration, Security, Media services and Network services, we at Tata Communications are envisaging a New World of Communications Linux Administrator L3 Engineer ( IT Operations & Infrastructure ) Employment Type On-roll Reporting Manager Direct reports Role Purpose Linux Administrator L3 Engineer - IT Operations & Infrastructure Key Responsibilities / Accountabilities We are seeking an experienced Linux Administrator Engineer (L3) to lead and manage Linux-based infrastructure across on-premises and cloud environments. This role requires expertise in advanced Linux system administration, performance tuning, security hardening, automation, high availability (HA) configurations, and troubleshooting complex issues. The ideal candidate should have deep knowledge of RHEL, CentOS, Ubuntu, SUSE, Oracle Linux, along with cloud Linux workloads (AWS, GCP, Azure, OCI), containerization (Docker, Kubernetes, OpenShift), and automation (Ansible, Terraform, Python, Bash). Major Duties & Responsibilities Linux Infrastructure Design & Management: Architect, deploy, and maintain enterprise-grade Linux environments (RHEL, CentOS, Ubuntu, SUSE, Oracle Linux). Design and implement scalable, highly available, and secure Linux-based systems. Perform advanced troubleshooting, root cause analysis (RCA), and performance tuning. Ensure system reliability, patching, and security updates for production servers. Cloud & Virtualization Administration: Optimize cloud-based Linux instances, auto-scaling, and cost management strategies. Work with VMware, KVM, Hyper-V, OpenStack for on-prem virtualization. Automation & Configuration Management: Automate Linux system administration tasks using Ansible, Terraform, Bash, Python, PowerShell. Implement Infrastructure as Code (IaC) to automate provisioning and configuration. Develop cron jobs, systemd services, and log rotation scripts. Security & Compliance: Implement Linux system hardening (CIS benchmarks, SELinux, AppArmor, PAM, SSH security). Configure firewall rules (iptables, nftables, firewalld), VPN, and access control policies. Ensure compliance with ISO 27001, PCI-DSS, HIPAA, and NIST security standards. Conduct vulnerability scanning, penetration testing, and security audits. Networking & High Availability (HA) Solutions: Configure and manage DNS, DHCP, NFS, iSCSI, SAN, CIFS, VLANs, and network bonding. Deploy Linux clusters, failover setups, and high-availability solutions (Pacemaker, Corosync, DRBD, Ceph, GlusterFS). Work with load balancing solutions (HAProxy, Nginx, F5, Cloud Load Balancers). Monitoring & Performance Optimization: Set up real-time monitoring tools (Prometheus, Grafana, Nagios, Zabbix, ELK, Site 24x7). Optimize CPU, memory, disk IO, and network performance for Linux workloads. Analyze and resolve kernel panics, memory leaks, and slow system responses. Backup & Disaster Recovery: Design and implement Linux backup & disaster recovery strategies (CommVault, Veeam, Rsync, AWS Backup, GCP Backup & DR, OCI Vaults). Perform snapshot-based recovery, failover testing, and disaster recovery planning. Collaboration & Documentation: Mentor L1 and L2 engineers, provide escalation support for critical incidents. Maintain technical documentation, SOPs, and knowledge base articles. Assist in capacity planning, forecasting, and IT infrastructure roadmaps. Required Knowledge, Skills And Abilities Expert-level knowledge of Linux OS administration, troubleshooting, and performance tuning. Strong hands-on expertise in server patching, automation, and security best practices. Deep understanding of cloud platforms (AWS, GCP, Azure, OCI) and virtualization (VMware, KVM, Hyper-V, OpenStack). Advanced networking skills in firewalls, VLANs, VPN, DNS, and routing. Proficiency in scripting (Bash, Python, Ansible, Terraform, PowerShell). Experience with high-availability architectures and clustering solutions. Strong problem-solving, analytical, and troubleshooting skills for mission-critical environments. Preferred Additional Skills And Abilities Experience with Linux-based Kubernetes clusters (EKS, AKS, GKE, OpenShift, Rancher). Understanding of CI/CD pipelines and DevOps tools (Jenkins, Git, GitLab, ArgoCD, Helm). Knowledge of big data, logging, and analytics tools (Splunk, ELK Stack, Kafka, Hadoop). Familiarity with database management on Linux (MySQL, PostgreSQL, MariaDB, MongoDB, Redis). Qualifications And Experience Following are the key skills and experience expected out of the candidate Bachelors in Communications / Computer Science OR Software Engineering OR related technical degree OR Experience 7+ years of experience in Linux administration and enterprise infrastructure. Proven track record in designing, implementing, and optimizing Linux environments. Experience with multi-cloud Linux workloads, scripting, security, and high availability. Certifications (Preferred But Not Mandatory) Red Hat Certified Engineer (RHCE) or RHCSA LPIC-3 (Linux Professional Institute Certification Level 3)

Lead and mentor a team of Linux system administrators, assigning tasks and monitoring performance. Design, deploy, maintain, and optimize Linux-based infrastructure (RedHat, CentOS, Oracle Linux, Ubuntu). Manage critical services such as Apache, Nginx, MySQL/MariaDB, etc. Configure and maintain monitoring tools (e.g., Nagios, Zabbix, Prometheus, Grafana). Implement and enforce security practices: patching, hardening, firewalls (iptables/nftables), SELinux. Oversee backup and disaster recovery processes. Plan and execute migrations, upgrades, and performance tuning. Collaborate with cross-functional teams (Network, DevOps, Development) to support infrastructure needs. Define and document policies, procedures, and best practices. Respond to incidents and lead root cause analysis for system outages or degradations. Maintain uptime and SLAs for production environments. Experience with virtualization (KVM, VMware, Proxmox) and cloud platforms (AWS, GCP, Azure, or private cloud). Solid understanding of TCP/IP, DNS, DHCP, VPN, and other network services Hands-on experience working on Firewall like Sophos, fortigate Strong problem-solving and incident management skills. Skills: cloud,azure,selinux,firewall management,proxmox,apache,cloud platforms,oracle linux,dns administration,nginx,linux administration,infrastructure,hardening,incident management,aws,backup and disaster recovery,security practices,dhcp,mariadb,virtualization,grafana,disaster recovery,ubuntu,centos,patching,vmware,dns,kvm,prometheous,linux,redhat,gcp,nagios,prometheus,mysql,problem solving,firewalls,zabbix,vpn,tcp/ip

Job Title : Linux Security Developer Experience : 5 - 12 Years Employment Type : Full-Time Location : Hyderabad Job Summary We are seeking a skilled and security-focused Linux Security Developer to design, develop, and maintain advanced security features for our embedded Linux platforms. You will play a key role in securing SoC-based systems by working across the full stack - from kernel to user space - ensuring robust boot processes, secure runtime environments, and protection against evolving threats. This role involves close collaboration with kernel, BSP, firmware, and DevOps teams to deliver secure, reliable, and compliant systems across diverse embedded applications. Key Responsibilities Develop and integrate security features into Linux kernel and user space, including SELinux, AppArmor, seccomp, IMA/EVM, and dm-verity. Implement and maintain Secure Boot, Trusted Execution Environments (TEE), and key management systems (e.g., TPM, OP-TEE). Analyze, triage, and patch vulnerabilities (CVEs); contribute to threat modeling and security incident response. Enhance access control, sandboxing, isolation, and container security at the kernel level. Support secure firmware update flows and storage encryption strategies. Collaborate with QA and DevOps teams to integrate security scanning, static analysis, and fuzz testing into CI/CD pipelines. Conduct code reviews, write technical documentation, and define secure coding and development standards. Required Skills Strong experience with Linux kernel development and embedded system security. In-depth knowledge of Linux hardening techniques : namespaces, cgroups, LSMs (e.g., SELinux, AppArmor), KASLR, ASLR. Hands-on experience with IMA/EVM, dm-verity, cryptsetup, keyrings, and filesystem-level protections. Proficient in C, Bash, and Python; familiarity with assembly language and GCC/Clang toolchains is a plus. Experience with Secure Boot implementations (UEFI, FIT image signing) and TPM/OP-TEE integration. Strong understanding of vulnerability management, CVE analysis, and Linux patching workflows. Preferred Skills Familiarity with secure software lifecycle practices and threat modeling frameworks (e.g., STRIDE, DREAD). Experience with custom Linux distributions using Yocto or Buildroot. Exposure to virtualization and container technologies such as KVM, Xen, Docker, LXC, or Kata Containers. Background in industries with high security and compliance requirements such as automotive, medical devices, or industrial systems. Understanding of compliance and security standards (e.g., FIPS, CIS Benchmark, GDPR, ISO 21434). Education : Bachelors or Masters degree in Computer Science, Cybersecurity, Electronics, or a related technical field. (ref:hirist.tech)

Job description Location : Fully Remote Job Type : Part-Time (4-5 hours/day, flexible schedule) Experience Level : Minimum 1 year of experience in Linux kernel development or OS design Schedule : 4-5 hours daily, Sunday off Project : Development of a custom Linux-based Operating System (OS) Job Description We are seeking a skilled and motivated Linux Kernel Developer to join our team remotely on a part-time basis to contribute to the development of a custom Linux-based Operating System (OS). This OS will initially serve our internal team’s needs and is planned for future enterprise-level commercialization. The developer will be responsible for customizing and optimizing the Linux kernel, developing custom modules, and ensuring the OS is secure, fast, and scalable. This is a part-time, remote position requiring 4-5 hours of work per day with a flexible schedule, and Sundays off. If you are passionate about operating system development and have hands-on experience with the Linux kernel, we’d love to hear from you! Key Responsibilities Linux Kernel Development: Customize and optimize the Linux kernel for specific use cases. Develop custom drivers, modules, and features as per project requirements. Tune kernel configurations for performance and security. OS Design and Integration: Integrate the kernel with bootloaders (e.g., GRUB), file systems (e.g., ext4, ZFS), and user-land tools. Assist in designing and testing a Minimum Viable Product (MVP) for the OS. Security and Performance: Implement security features such as memory safety, sandboxing, and Mandatory Access Control (e.g., SELinux, AppArmor). Benchmark and optimize kernel and OS performance. Code Quality and Documentation: Write clean, well-documented, and maintainable code. Create technical documentation for developers and end-users. Collaboration: Work closely with other developers, UI/UX designers, and QA engineers. Provide regular updates and participate in progress reviews via remote communication tools. Required Qualifications Technical Skills: Minimum 1 year of experience in Linux kernel development or OS design. Proficiency in C programming (mandatory); experience with Rust and Assembly (preferred). Knowledge of Linux kernel modules, drivers, and file systems (e.g., ext4, Btrfs, ZFS). Familiarity with tools such as GCC, Clang, GDB, QEMU, Git, and Make. Understanding of security concepts like SELinux, AppArmor, and memory safety. Basic knowledge of bootloaders (e.g., GRUB) and system startup processes. Knowledge of microkernels (e.g., seL4) or formal verification. Familiarity with cloud integration (e.g., Kubernetes, Docker). Contributions to open-source projects, especially Linux or related OS projects. Understanding of networking protocols (e.g., IPv6, WireGuard). Education: Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent experience). Other Skills: Ability to work independently in a remote environment. Availability to commit to 4-5 hours daily with a flexible schedule. Strong problem-solving and analytical skills. Good communication skills in English and Hindi. Note: As an early-stage startup, we’re looking for candidates who are enthusiastic and willing to work diligently with limited resources.

Job Title: Linux Security Developer Experience: 5–12 Years Employment Type: Full-Time Location: [Hyderabad ] Job Summary We are seeking a skilled and security-focused Linux Security Developer to design, develop, and maintain advanced security features for our embedded Linux platforms. You will play a key role in securing SoC-based systems by working across the full stack—from kernel to user space—ensuring robust boot processes, secure runtime environments, and protection against evolving threats. This role involves close collaboration with kernel, BSP, firmware, and DevOps teams to deliver secure, reliable, and compliant systems across diverse embedded applications. Key Responsibilities Develop and integrate security features into Linux kernel and user space, including SELinux, AppArmor, seccomp, IMA/EVM, and dm-verity. Implement and maintain Secure Boot, Trusted Execution Environments (TEE), and key management systems (e.g., TPM, OP-TEE). Analyze, triage, and patch vulnerabilities (CVEs); contribute to threat modeling and security incident response. Enhance access control, sandboxing, isolation, and container security at the kernel level. Support secure firmware update flows and storage encryption strategies. Collaborate with QA and DevOps teams to integrate security scanning, static analysis, and fuzz testing into CI/CD pipelines. Conduct code reviews, write technical documentation, and define secure coding and development standards. Required Skills Strong experience with Linux kernel development and embedded system security. In-depth knowledge of Linux hardening techniques: namespaces, cgroups, LSMs (e.g., SELinux, AppArmor), KASLR, ASLR. Hands-on experience with IMA/EVM , dm-verity , cryptsetup , keyrings, and filesystem-level protections. Proficient in C, Bash, and Python ; familiarity with assembly language and GCC/Clang toolchains is a plus. Experience with Secure Boot implementations (UEFI, FIT image signing) and TPM/OP-TEE integration. Strong understanding of vulnerability management , CVE analysis, and Linux patching workflows. Preferred Skills Familiarity with secure software lifecycle practices and threat modeling frameworks (e.g., STRIDE, DREAD). Experience with custom Linux distributions using Yocto or Buildroot . Exposure to virtualization and container technologies such as KVM , Xen , Docker , LXC , or Kata Containers . Background in industries with high security and compliance requirements such as automotive , medical devices , or industrial systems . Understanding of compliance and security standards (e.g., FIPS , CIS Benchmark , GDPR , ISO 21434 ). Education Bachelor’s or Master’s degree in Computer Science , Cybersecurity , Electronics , or a related technical field. If you are looking for job change share your updated resume to vagdevi@semi-leaf.com “Your reference would be greatly appreciated” Job Type: Full-time Pay: Up to ₹6,000,000.00 per year Experience: SELinux, AppArmor, IMAEVM, dm-verity, cryptsetup, keyrings: 1 year (Required) • Proficiency in C, Bash, and Python: 1 year (Required) Bootflow (UEFI/Secure Boot, FIT image signing, TPM/OP-TEE: 1 year (Required) working on automotive, medical, industrial-grades is a plus.: 1 year (Required) Work Location: In person

Description: Year of Exp- 6 to 10 Years Location - Bangalore Work Mode- 5 days from office Requirements: Bachelor’s degree in computer science (or a related program) or equivalent work experience At least 8+ years of development experience in embedded devices. Highly proficient in C, C++11/14 Highly proficient in Linux operating system Experience in Shell-Script, Makefile, Python Expertise in 'git' , bug tracking tools. Experience in HAL layer, notification system, IPC multi-processing, multi-threading, debugging/core dump analysis. Highly Desirable Experience in Device driver/kernel-modules/u-boot/board-bring up/filesystem/memory management/SELinux, toolchain/makefile/cmake/build environment set-ups, dockers containerization, snapcraft. Appetite for fixing complex bugs Good communication, problem solving skills and team player. Job Responsibilities: same as above What We Offer: Exciting Projects: We focus on industries like High-Tech, communication, media, healthcare, retail and telecom. Our customer list is full of fantastic global brands and leaders who love what we build for them. Collaborative Environment: You Can expand your skills by collaborating with a diverse team of highly talented people in an open, laidback environment — or even abroad in one of our global centers or client facilities! Work-Life Balance: GlobalLogic prioritizes work-life balance, which is why we offer flexible work schedules, opportunities to work from home, and paid time off and holidays. Professional Development: Our dedicated Learning & Development team regularly organizes Communication skills training(GL Vantage, Toast Master),Stress Management program, professional certifications, and technical and soft skill trainings. Excellent Benefits: We provide our employees with competitive salaries, family medical insurance, Group Term Life Insurance, Group Personal Accident Insurance , NPS(National Pension Scheme ), Periodic health awareness program, extended maternity leave, annual performance bonuses, and referral bonuses. Fun Perks: We want you to love where you work, which is why we host sports events, cultural activities, offer food on subsidies rates, Corporate parties. Our vibrant offices also include dedicated GL Zones, rooftop decks and GL Club where you can drink coffee or tea with your colleagues over a game of table and offer discounts for popular stores and restaurants!

Linux administration (RHEL, Ubuntu, Oracle Linux, SUSE): install, configure, patch, harden, and tune systems. Shell scripting (Bash, sh, ksh): automate tasks and build health check/monitoring scripts. Networking fundamentals: TCP/IP, DNS, DHCP, routing, VLANs, and troubleshooting using tools like netstat, traceroute, tcpdump. Storage management: LVM, RAID, NFS, SAN, iSCSI, and disk management. User and permission management: users, groups, sudoers, PAM, and file permissions. System monitoring and troubleshooting: using top, htop, iostat, vmstat, journalctl, and log analysis. Security best practices: SELinux, firewalld/iptables, SSH hardening, vulnerability remediation. Virtualization and containers: familiarity with KVM, VMware, Docker basics. Strong analytical troubleshooting skills. Clear documentation skills for processes and configurations. Good time management to handle patching, KTLO, and project work. Ability to collaborate across multiple technical teams

Dear Connects, We are hiring for Linux Administrator Role. Location: - Mumbai Interested Candidate can share cv at manisha.shahiri@aqmtechnologies.com Key Responsibilities: System Administration: Install, configure, and maintain Linux-based servers (CentOS, Ubuntu, RedHat, etc.). Monitoring and Performance Tuning: Monitor server performance and resolve issues related to CPU, memory, disk usage, and system resources. Security Management: Implement and enforce security policies, patching, and upgrades to ensure the systems are secure and up to date. Backup and Recovery: Manage system backups and disaster recovery operations, ensuring data integrity and availability. Automation: Automate administrative tasks using scripting languages like Bash, Python, or Ansible. Troubleshooting: Diagnose and resolve Linux-related system and network issues, ensuring minimal downtime. Collaboration: Work closely with development and DevOps teams to ensure efficient system integration and operation. Documentation: Maintain system documentation, including configurations, procedures, and incident resolutions. Required Skills & Qualifications: Operating Systems: Strong experience with Linux distributions (CentOS, Ubuntu, RHEL). Scripting: Proficiency in Bash, Python, or other scripting languages to automate tasks. Networking: Knowledge of TCP/IP, DNS, DHCP, and VPNs. Security: Understanding of firewalls, SELinux, iptables, and other security tools. Storage Management: Experience with file systems, NFS, RAID, and LVM. Web Servers: Familiarity with Apache, Nginx, or other web servers. Version Control: Experience with Git or similar version control systems. Monitoring Tools: Hands-on experience with monitoring tools like Nagios, Zabbix, or Prometheus. Cloud Computing: Experience with cloud platforms like AWS, GCP, or Azure is a plus. Virtualization: Familiarity with virtualization tools such as VMware, KVM, or Docker is an advantage. Should have passed B.E./ B.Tech/ M.Tech in any stream OR M.Sc.(IT)/ MCA or equivalent from any recognized College/ University duly approved by AICTE.

JD for Linux Administration- We are seeking a proactive and detail-oriented Linux System Administrator to join our IT Operations team. In this role, you will design, deploy, secure, and maintain our Linux-based infrastructure, ensuring high availability and optimal performance of critical services. Key Responsibilities:- System Deployment & Configuration Install, configure, and harden Linux distributions (RHEL/CentOS, Ubuntu, Debian). Automate server provisioning using configuration management tools (Ansible, Puppet, Chef). Authentication & Directory Services Deploy, and manage RADIUS servers (e.g., FreeRADIUS) for VPN/Wi-Fi authentication. Implement and maintain LDAP directory services (OpenLDAP, 389 DS) for centralized user management. Database Administration Install, configure, and tune databases (MySQL, MariaDB, PostgreSQL). Develop backup, restore, and fail-over procedures to ensure data integrity. Networking & Security Configure firewalls (iptables, firewalld), VPNs (OpenVPN, IPsec), and network services (DNS, DHCP). Enforce security best practices: patch management, SELinux policies, intrusion detection (fail2ban, auditd). Monitoring & Troubleshooting Implement and maintain monitoring solutions (Nagios, Zabbix, Prometheus/Grafana). Respond to and resolve incidents; perform root-cause analysis and document findings. Scripting & Automation Develop shell and Python scripts to automate routine maintenance and reporting tasks. Documentation & Collaboration Maintain up-to-date runbooks, system diagrams, and SOPs. Collaborate with developers and network engineers on deployments, capacity planning, and security audits. About US -: Webmobril is One of the top-notch IT companies based in Delhi, NCR; India and also established in the US. Offering exclusive and affordable Web, Mobile, and Game app development, Cyber Security Assessment, Digital Marketing services globally. Recently we started Staffing Services and Travel & Tourism services . We are a team of experienced, dedicated enthusiastic, innovative, and creative professionals to serve a range of business goals with our advanced tools and technologies. For more detail you can go through our company website: https://www.webmobril.com/ Kindly confirm the availability. In case any queries and concerns feel free to write back to us. Regards, Mansi Hada HR Executive IBEM Solutions LLP M: +91- 9352449814 Address- G-18, Noida sector 63, 201301 www.b2bstreets.com | www.ibem.co.in |

You are a Senior-Level Subject Matter Expert (L4) specializing in Red Hat OpenShift Enterprise Administration within the Telco domain, with a focus on bare metal deployments. Your primary responsibility is to manage and enhance Telco-grade workloads for a global Tier-1 telecommunications provider, ensuring platform resilience, lifecycle governance, and continuous integration across critical services. Your key responsibilities include serving as the OpenShift Bare Metal Admin SME for complex Telco workloads on private cloud infrastructure, overseeing end-to-end deployment, scaling, and lifecycle operations of Red Hat OpenShift on bare metal environments, and owning upgrade readiness and rollback strategies. You will collaborate closely with OEM vendors for platform bug RCA and patch governance, enable monitoring, alerting, compliance enforcement, and automation for large-scale cluster environments, and ensure platform alignment with Telco service and regulatory requirements in coordination with network, security, and architecture teams. Additionally, you will be responsible for integrating with CI/CD pipelines, GitOps, observability frameworks (such as Prometheus and Grafana), and ITSM tools, driving operational maturity through SOP creation, audit compliance, RCA publishing, and incident retrospectives, as well as mentoring junior engineers and reviewing configurations impacting production-grade OpenShift clusters. To excel in this role, you must have at least 8 years of direct experience managing Red Hat OpenShift v4.x on bare metal, strong expertise in Kubernetes, SDN, CNI plugins, CoreOS, and container runtimes (CRI-O/containerd), experience with BIOS provisioning, PXE boot environments, and bare metal cluster node onboarding, as well as familiarity with Telco Cloud principles, especially NFV/CNF workloads. Proficiency in RHEL administration, Ansible automation, Terraform (optional), and compliance remediation is essential, along with an understanding of storage backends (preferably Ceph), NTP/DNS/syslog integration, and cluster certificate renewal processes. Moreover, hands-on experience with Red Hat Satellite, Quay, multi-tenant OpenShift workloads, and security features like SELinux, SCCs, RBAC, and namespace isolation is required. Preferred certifications include Red Hat Certified Specialist in OpenShift Administration (EX280), Red Hat Certified System Administrator (RHCSA), and Certified Kubernetes Administrator (CKA) as a bonus.,

Role: L4 SME – Red Hat OpenShift Enterprise Admin (Telco Domain – Bare Metal) Location: Offshore – Noida / Other Offshore India Delivery Centers Experience Level: 10–14 Years Role Type: Individual Contributor with Senior Technical Ownership Role Summary We are seeking a Senior-Level SME (L4) in Red Hat OpenShift Enterprise Administration with deep, hands-on expertise in bare metal OpenShift deployments. The SME will play a key role in managing and stabilizing Telco-grade workloads for a global Tier-1 telecommunications provider, ensuring platform resilience, lifecycle governance, and continuous integration across critical services. Key Responsibilities Act as the OpenShift Bare Metal Admin SME supporting complex Telco workloads hosted on private cloud infrastructure. Lead end-to-end deployment, scaling, and lifecycle operations of Red Hat OpenShift on bare metal environments. Own upgrade readiness and rollback strategies, working closely with OEM vendors for platform bug RCA and patch governance. Enable monitoring, alerting, compliance enforcement, and automation for large-scale cluster environments. Collaborate with network, security, and architecture teams to ensure platform alignment with Telco service and regulatory requirements. Ensure integration with CI/CD pipelines, GitOps, observability frameworks (Prometheus/Grafana), and ITSM tools. Drive operational maturity through SOP creation, audit compliance, RCA publishing, and incident retrospectives. Mentor junior engineers and review configurations impacting production-grade OpenShift clusters. Required Skills 8+ years of direct experience managing Red Hat OpenShift v4.x on bare metal. Strong expertise in Kubernetes, SDN, CNI plugins, CoreOS, and container runtimes (CRI-O/containerd). Experience with BIOS provisioning, PXE boot environments, and bare metal cluster node onboarding. Familiarity with Telco Cloud principles, especially NFV/CNF workloads. Proficiency in RHEL administration, Ansible automation, Terraform (optional), and compliance remediation. Understanding of storage backends (Ceph preferred), NTP/DNS/syslog integration, and cluster certificate renewal processes. Working knowledge of Red Hat Satellite, Quay, and multi-tenant OpenShift workloads. Hands-on with security features like SELinux, SCCs, RBAC, and namespace isolation. Preferred Certifications Red Hat Certified Specialist in OpenShift Administration (EX280) – Highly Preferred Red Hat Certified System Administrator (RHCSA) Certified Kubernetes Administrator (CKA) – Bonus

Responsibilities : Build and maintain customized Android Automotive OS (AAOS) images. Integrate and configure system services, vehicle HALs, and CAN/OBD communication modules. Enable peripherals: touchscreen, audio, Wi-Fi, BLE, 4G/5G, GPS, sensors (IMU, barometer, light). Work on AAOS system UI, overlays, and multi-display support. Ensure OTA upgrade and version control integration across custom AAOS branches. Requirements : Strong experience with AOSP/AAOS build system, repo, and Git. Experience with HAL integration, CAN bus, and vehicle property framework. Hands-on with Linux/embedded BSPs and device tree configuration. Familiarity with SELinux, systemd, and low-level Android services. Job Type: Permanent Pay: ₹51,155.36 - ₹91,031.99 per month Schedule: Morning shift Work Location: In person

Responsibilities : Build and maintain customized Android Automotive OS (AAOS) images. Integrate and configure system services, vehicle HALs, and CAN/OBD communication modules. Enable peripherals: touchscreen, audio, Wi-Fi, BLE, 4G/5G, GPS, sensors (IMU, barometer, light). Work on AAOS system UI, overlays, and multi-display support. Ensure OTA upgrade and version control integration across custom AAOS branches. Requirements : Strong experience with AOSP/AAOS build system, repo, and Git. Experience with HAL integration, CAN bus, and vehicle property framework. Hands-on with Linux/embedded BSPs and device tree configuration. Familiarity with SELinux, systemd, and low-level Android services.

JD for Linux Administration- · We are seeking a proactive and detail-oriented Linux System Administrator to join our IT Operations team. In this role, you will design, deploy, secure, and maintain our Linux-based infrastructure, ensuring high availability and optimal performance of critical services. Key Responsibilities:- · System Deployment & Configuration o Install, configure, and harden Linux distributions (RHEL/CentOS, Ubuntu, Debian). o Automate server provisioning using configuration management tools (Ansible, Puppet, Chef). · Authentication & Directory Services o Deploy, and manage RADIUS servers (e.g., FreeRADIUS) for VPN/Wi-Fi authentication. o Implement and maintain LDAP directory services (OpenLDAP, 389 DS) for centralized user management. · Database Administration o Install, configure, and tune databases (MySQL, MariaDB, PostgreSQL). o Develop backup, restore, and fail-over procedures to ensure data integrity. · Networking & Security o Configure firewalls (iptables, firewalld), VPNs (OpenVPN, IPsec), and network services (DNS, DHCP). o Enforce security best practices: patch management, SELinux policies, intrusion detection (fail2ban, auditd). · Monitoring & Troubleshooting o Implement and maintain monitoring solutions (Nagios, Zabbix, Prometheus/Grafana). o Respond to and resolve incidents; perform root-cause analysis and document findings. · Scripting & Automation o Develop shell and Python scripts to automate routine maintenance and reporting tasks. · Documentation & Collaboration o Maintain up-to-date runbooks, system diagrams, and SOPs. o Collaborate with developers and network engineers on deployments, capacity planning, and security audits. About US -: Webmobril is One of the top-notch IT companies based in Delhi, NCR; India and also established in the US. Offering exclusive and affordable Web, Mobile, and Game app development, Cyber Security Assessment, Digital Marketing services globally. Recently we started Staffing Services and Travel & Tourism services . We are a team of experienced, dedicated enthusiastic, innovative, and creative professionals to serve a range of business goals with our advanced tools and technologies. For more detail you can go through our company website: https://www.webmobril.com/

Qualcomm India Private Limited is currently seeking a Yocto (Linux Distribution) Dev Engineer to join the Engineering Group, specifically in the Software Engineering domain. As a Yocto Dev Engineer, you will be responsible for utilizing your expertise in C, embedded programming, and Linux kernel programming, with mandatory experience in Yocto or Android development. The ideal candidate should be willing to learn new technologies to effectively deliver assigned tasks. In addition to the required skills, preferred qualifications include knowledge in Linux Security, selinux, fuzzing tools, openwrt platform, and Device Driver. The role also entails abiding by all applicable policies and procedures, including security measures to protect the confidentiality of Company information and other proprietary data. Candidates applying for this position should hold a Bachelor's degree in Engineering, Information Systems, Computer Science, or a related field. Qualcomm is an equal opportunity employer committed to providing reasonable accommodations for individuals with disabilities throughout the application and hiring process. For inquiries or further information regarding this role, please reach out to Qualcomm Careers directly. Please note that Qualcomm's Careers Site is exclusively for individuals seeking job opportunities within Qualcomm. Staffing and recruiting agencies, as well as individuals represented by such agencies, are not authorized to submit profiles, applications, or resumes through this platform. Unsolicited submissions from agencies will not be considered, and Qualcomm does not accept resumes or applications forwarded by third-party entities.,

Job Area: Engineering Group, Engineering Group > Software Engineering General Summary: Linux Security Engineer Enable linux security Mitigation features and develop tools to detect vulnerabilities o Skills/experienceC, C++, python, embedded programming and Linux kernel programming, Android development experience mandatory. Arm or Intel Architecture knowledge required. Candidate must be willing to learn new technologies for delivering the assigned tasks. o Preferred skillsJava programming language Linux Security knowledge, selinux, fuzzing/syzkaller tools knowledge, Device Driver knowledge preferred skill set. o ResponsibilitiesDevelop Security Mitigation features at kernel and user space. Work with Tech teams to understand the security design reviews and help to provide alternative design solutions. Minimum Qualifications: Bachelor's degree in Engineering, Information Systems, Computer Science, or related field and 2+ years of Software Engineering or related work experience. OR Master's degree in Engineering, Information Systems, Computer Science, or related field and 1+ year of Software Engineering or related work experience. OR PhD in Engineering, Information Systems, Computer Science, or related field. 2+ years of academic or work experience with Programming Language such as C, C++, Java, Python, etc. Education requirementsB.E, B.Tech or M.Tech from reputed institution with good CGPA and 3-5 experience in embedded domain. Applicants Qualcomm is an equal opportunity employer. If you are an individual with a disability and need an accommodation during the application/hiring process, rest assured that Qualcomm is committed to providing an accessible process. You may e-mail disability-accomodations@qualcomm.com or call Qualcomm's toll-free number found here. Upon request, Qualcomm will provide reasonable accommodations to support individuals with disabilities to be able participate in the hiring process. Qualcomm is also committed to making our workplace accessible for individuals with disabilities. (Keep in mind that this email address is used to provide reasonable accommodations for individuals with disabilities. We will not respond here to requests for updates on applications or resume inquiries). Qualcomm expects its employees to abide by all applicable policies and procedures, including but not limited to security and other requirements regarding protection of Company confidential information and other confidential and/or proprietary information, to the extent those requirements are permissible under applicable law. To all Staffing and Recruiting Agencies Please do not forward resumes to our jobs alias, Qualcomm employees or any other company location. Qualcomm is not responsible for any fees related to unsolicited resumes/applications. If you would like more information about this role, please contact Qualcomm Careers.

Business Unit Cubic Corporation Company Details When you join Cubic, you become part of a company that creates and delivers technology solutions in transportation to make people’s lives easier by simplifying their daily journeys, and defense capabilities to help promote mission success and safety for those who serve their nation. Led by our talented teams around the world, Cubic is committed to solving global issues through innovation and service to our customers and partners. We have a top-tier portfolio of businesses, including Cubic Transportation Systems (CTS) and Cubic Defense (CD). Explore more on Cubic.com. Job Details Job Summary : We’re looking for a Senior Systems Administrator who can blend strong technical know-how with a deep understanding of Linux and Azure environments to support and scale our growing infrastructure needs. Work Shift: 24x7 Rotational Experience: 5+ Years Primary Skills: Linux, Azure, Production Systems Secondary Skills: Windows Server, VMware Responsibilities 🔹 Azure Administration Design, deploy, and manage resources in Azure using ARM templates and Terraform. Implement secure, scalable Azure environments with IAM and networking (VNets, NSGs, Load Balancers, Gateways). Monitor and optimize resources using Azure Monitor, Log Analytics, and Application Insights. Drive cost efficiency, disaster recovery planning, and resource utilization. Collaborate on cloud migrations, vulnerability remediation, and system modernization. Certification such as Azure Administrator Associate or Solutions Architect Expert is a huge plus! 🔹 Linux Administration (CentOS/Red Hat) Administer and maintain production-grade Linux servers, perform OS patching, tuning, and secure configurations (SELinux, iptables, etc.). Manage storage using LVM, configure NFS/SMB, and automate tasks via shell scripting or tools like Ansible/Chef. Support open-source tools like Nginx, Apache, SFTP/FTP, and assist in performance tuning and capacity planning. Troubleshoot system issues and work with hardware vendors when needed. 🔹 Windows + VMware (Secondary Skillset) Manage Windows Server environments alongside Hyper-V/VMware virtual infrastructure. Ensure backup, recovery, and business continuity measures are in place. Contribute to identity access management across hybrid environments. Minimum Job Requirements Bachelor's degree, or equivalent years of experience in lieu of a degree. Five (5)+ years of hands-on experience in systems administration, with a focus on Azure and Linux. Proven expertise in enterprise IT environments, system performance, and infrastructure management. Ability to work in a rotational 24x7 support model. You bring a solution-driven mindset, stay updated with tech trends, and thrive in a collaborative, high-stakes environment. Worker Type Employee

JD for Linux Administration- · We are seeking a proactive and detail-oriented Linux System Administrator to join our IT Operations team. In this role, you will design, deploy, secure, and maintain our Linux-based infrastructure, ensuring high availability and optimal performance of critical services. Key Responsibilities:- · System Deployment & Configuration o Install, configure, and harden Linux distributions (RHEL/CentOS, Ubuntu, Debian). o Automate server provisioning using configuration management tools (Ansible, Puppet, Chef). · Authentication & Directory Services o Deploy, and manage RADIUS servers (e.g., FreeRADIUS) for VPN/Wi-Fi authentication. o Implement and maintain LDAP directory services (OpenLDAP, 389 DS) for centralized user management. · Database Administration o Install, configure, and tune databases (MySQL, MariaDB, PostgreSQL). o Develop backup, restore, and fail-over procedures to ensure data integrity. · Networking & Security o Configure firewalls (iptables, firewalld), VPNs (OpenVPN, IPsec), and network services (DNS, DHCP). o Enforce security best practices: patch management, SELinux policies, intrusion detection (fail2ban, auditd). · Monitoring & Troubleshooting o Implement and maintain monitoring solutions (Nagios, Zabbix, Prometheus/Grafana). o Respond to and resolve incidents; perform root-cause analysis and document findings. · Scripting & Automation o Develop shell and Python scripts to automate routine maintenance and reporting tasks. · Documentation & Collaboration o Maintain up-to-date runbooks, system diagrams, and SOPs. o Collaborate with developers and network engineers on deployments, capacity planning, and security audits. About US -: Webmobril is One of the top-notch IT companies based in Delhi, NCR; India and also established in the US. Offering exclusive and affordable Web, Mobile, and Game app development, Cyber Security Assessment, Digital Marketing services globally. Recently we started Staffing Services and Travel & Tourism services . We are a team of experienced, dedicated enthusiastic, innovative, and creative professionals to serve a range of business goals with our advanced tools and technologies. For more detail you can go through our company website: https://www.webmobril.com/ Kindly confirm the availability. In case any queries and concerns feel free to write back to us.

Job Requirements Architect & Lead Storage Subsystem Development: Design and lead implementation of Linux-based storage stack for embedded or server platforms. Define architecture for storage interfaces (eMMC, UFS, NVMe, SATA, SD, USB mass storage, etc.). Optimize for performance, power, and reliability on target SoC or platform. Driver Development & Integration: Develop and maintain Linux kernel drivers for storage devices and controllers. Ensure upstream alignment with mainline Linux or maintain vendor-specific forks as needed. Integrate vendor storage controller IPs and firmware. File System & Block Layer Expertise: Work with Linux file systems (ext4, f2fs, xfs, btrfs). Optimize storage stack performance using IO schedulers, caching strategies, and tuning. Reliability, Data Integrity & Power Resilience: Implement support for journaling, wear leveling (especially for flash), secure erase, and TRIM. Ensure data integrity during power loss (power-fail robustness). Work with hardware teams on power rail sequencing and power management integration. Cross-Functional Collaboration: Coordinate with SoC vendors, QA, product management, and firmware/hardware teams. Collaborate with bootloader, security, and OTA (Over-The-Air) update teams for seamless storage handling. Debugging & Performance Analysis: Use tools like blktrace, iostat, fio, perf, strace, and kernel logs for performance and issue analysis. Root cause field issues (e.g., storage corruption, I/O latency) across layers. Compliance & Validation: Validate storage against JEDEC/UFS/SD/USB/NVMe standards. Ensure support for secure boot, encrypted storage (dm-crypt, LUKS), and SELinux/AppArmor policies where needed. Mentorship & Leadership: Lead and mentor a team of kernel and platform developers. Conduct code reviews and establish best practices for Linux storage development. Work Experience Kernel Programming: Strong knowledge of Linux storage subsystems (block layer, VFS, I/O stack). Proficiency in C and kernel debugging techniques. Storage Protocols & Interfaces: Hands-on with eMMC, UFS, NVMe, USB mass storage, SATA, SPI-NAND/NOR, SDIO, etc. Understanding of storage standards (SCSI, AHCI, NVMe spec, JEDEC). Filesystems: Deep knowledge of ext4, f2fs, and familiarity with log-structured or flash-optimized file systems. Performance & Tuning: Expertise in tuning I/O performance and handling flash-specific issues (latency, endurance, etc.). Tools: blktrace, iostat, fio, perf, gdb, crash, etc. Security: Secure storage handling, key management, dm-verity/dm-crypt, rollback protection. Yocto/Build Systems (optional but useful): Understanding of build flows for embedded Linux using Yocto or Buildroot.

Job Requirements Lead the design and implementation of security features in the Linux kernel and user space on Qualcomm SoCs. Develop and maintain secure boot, trusted execution environments (TEE), and kernel-level protections (e.g., SELinux, AppArmor). Integrate and manage secure key storage, cryptographic services, and access control mechanisms. Ensure platform compliance with security standards like PSA, FIPS, GDPR, and Android Enterprise. Collaborate with firmware, hardware security module (HSM), and virtualization teams to implement end-to-end secure solutions. Perform threat modeling, code reviews, and security audits across Linux components. Guide and mentor junior engineers on secure coding practices and system hardening techniques. Interface with external security researchers and lead incident response efforts when vulnerabilities are reported. Contribute to security upstream efforts and represent Qualcomm in relevant open-source communities. Work Experience Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or a related field. 8+ years of experience in embedded Linux system development with a strong focus on security . Deep knowledge of Linux security mechanisms (SELinux, namespaces, cgroups, LSMs). Strong understanding of secure boot , measured boot , UEFI , TPM , and TEE (e.g., TrustZone) . Experience with cryptographic libraries (OpenSSL, WolfSSL, etc.) and key management . Proficient in C/C++ , Linux internals, and shell/Python scripting. Solid grasp of threat modeling, CVE management, and secure software development lifecycle (SSDLC). Strong debugging and root cause analysis skills

We are seeking a highly skilled System Administrator with a strong background in Linux systems, virtualization (KVM), and infrastructure management tools. The ideal candidate should have a minimum of 3 years hands-on experience with KVM, and solid expertise in WireGuard VPN, Postfix mail server, PostgreSQL database management, and Nagios monitoring setup. This is a mission-critical role to manage, secure, and optimize our server infrastructure and ensure high availability of internal and client-facing systems. Key Responsibilities: Virtualization & Infrastructure Management Design, deploy, and manage virtual machines using KVM (Kernel-based Virtual Machine). Perform regular backup, migration, and scaling of KVM-based instances. Configure and maintain libvirt, virt-manager, and associated tooling. Networking & VPN Configure and maintain WireGuard VPN for secure communication between distributed systems and users. Implement firewall and network routing rules in alignment with security policies. Mail Server Management Administer and harden Postfix mail servers (including TLS, SPF, DKIM, DMARC configurations). Monitor mail queues, handle spam filtering, and debug delivery issues. Database Administration Install, configure, and manage PostgreSQL servers. Perform regular backups, replication setup, tuning, and query optimization. Monitoring & Alerting Set up and maintain Nagios for system, application, and service monitoring. Define custom checks, thresholds, and notification rules. System Security & Compliance Apply regular OS and software patches. Manage user permissions, SSH access, and audit logs. Implement basic SELinux/AppArmor policies where required. Required Skills: 5+ years of experience as a Linux System Administrator. Minimum 3 years hands-on with KVM virtualization in production. Proficiency in WireGuard VPN, Postfix, PostgreSQL, and Nagios. Strong shell scripting skills (Bash, Python preferred). Comfortable with version control tools (Git), CI/CD pipelines, and infrastructure documentation. Preferred Qualifications: Experience with tools like Ansible, Terraform, or Proxmox. Familiarity with containerization (Docker) and orchestration (Kubernetes) is a plus. Knowledge of TLS/SSL certificate management. Understanding of DNS management, NGINX/Apache, and load balancing.