Linux System Administrator

Job Summary:

Linux System and Networking Administrator

Key Responsibilities:

Linux System Administration

• Install, configure, and maintain Linux servers (Ubuntu, CentOS, RHEL) in physical and virtual environments.
• Manage web, database, file, and directory services, including Apache/Nginx, MySQL/PostgreSQL, Samba, and LDAP.
• Develop and maintain system automation scripts using Bash, Ansible, or similar tools.
• Ensure system uptime, performance, and reliability through proactive monitoring and maintenance.

Virtualization & Infrastructure Management

• Administer and maintain

  Proxmox VE

  and

  VMware vCenter/ESXi

  virtual environments.
• Provision, clone, snapshot, and manage virtual machines and containers.
• Monitor and optimize virtual resource utilization (CPU, memory, storage).
• Assist in planning and implementing scalable, redundant virtualization infrastructure.

Network Administration

• Design, configure, and manage LAN/WAN environments, including

  VLANs

  ,

  routing

  ,

  trunking

  , and

  link aggregation

  .
• Administer and maintain

  firewalls

  (e.g., pfSense, iptables, FortiGate),

  VPNs

  , and secure remote access solutions (OpenVPN, WireGuard).
• Monitor network performance and troubleshoot issues using tools like

  tcpdump

  ,

  Wireshark

  , and

  NetFlow

  .
• Maintain DNS, DHCP, NAT, and port forwarding rules in both physical and virtualized networks.

Security and Compliance

• Harden Linux systems and network infrastructure based on best practices.
• Conduct periodic audits, patching, and updates for operating systems, hypervisors, and firewalls.
• Implement and maintain intrusion detection/prevention systems (IDS/IPS) and network access control.

Support & Documentation

• Provide tier 2/3 support for Linux, network, and virtualization-related issues.
• Document infrastructure, network diagrams, system configurations, and SOPs.
• Work closely with IT security, DevOps, and cloud teams to ensure a consistent and secure infrastructure.

Requirements:

Experience

• 3–5+ years of experience in Linux system administration and networking.
• 3+ years’ experience managing Proxmox or VMware vCenter environments.

Technical Skills

• Proficient in Linux (RHEL, CentOS, Ubuntu).
• Hands-on experience with

  Proxmox VE

  ,

  vSphere

  , and

  VMware vCenter

  .
• Deep understanding of

  networking fundamentals

  : TCP/IP, DNS, DHCP, VLANs, routing protocols, and NAT.
• Experience configuring and managing

  firewalls

  and

  VPNs

  .
• Strong scripting and automation skills (Bash, Ansible, or Python).
• Familiar with monitoring/logging tools: Zabbix, Grafana, ELK, or similar.

Preferred Qualifications

• Certifications: RHCE, VCP, CCNA, CompTIA Network+, or equivalent.
• Experience with SDN, high availability setups, and network segmentation.
• Familiarity with hybrid cloud infrastructure or on-premises to cloud migrations.

Soft Skills

• Strong analytical and troubleshooting skills.
• Ability to work independently and under pressure.
• Good communication and documentation abilities.
• Willingness to participate in an on-call rotation.