Linux System Administrator

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Job Summary

Linux System Administrator

RHEL and Ubuntu servers

LVM partition management

kernel upgrades

virtualization technologies

VMware

RHEV

Key Responsibilities

• Linux Server Administration
• Install, configure, and maintain Linux operating systems (RHEL, Ubuntu).
• Manage system services such as SSH, DNS, NTP, and syslog.
• Perform OS patching, upgrades, and health checks.
• Troubleshoot OS, network, and application-related issues.
• Filesystem & Storage Management
• Create and manage partitions using LVM (Logical Volume Manager).
• Extend or shrink file systems as per requirements.
• Manage mount points and handle disk utilization issues.
• Work with storage teams for volume provisioning and integration.
• Kernel & System Updates
• Perform kernel upgrades, patching, and reboot validations.
• Maintain system stability during updates and rollback in case of failures.
• Monitor system logs for kernel or hardware-related issues.
• Server Architecture & Performance
• Understand server hardware architecture — CPU, memory, storage, and NICs.
• Analyze and optimize system performance using tools like top, iostat, vmstat, and sar.
• Troubleshoot high load or performance degradation issues.
• Virtualization & Infrastructure Management
• Manage virtualized environments (VMware, RHEV).
• Create and configure virtual machines, snapshots, and resource allocations.
• Troubleshoot virtual machine connectivity and performance issues.
• Support migration and backup of virtual instances.
• System Security & Compliance
• Implement OS-level security (firewall, SELinux, user privileges).
• Ensure compliance with patching and access control policies.
• Maintain sudoers configurations and manage user/group permissions.
• Backup & Recovery
• Schedule and monitor system backups.
• Perform system recovery and restore activities.
• Validate backup integrity and retention policies.
• Automation & Documentation
• Write shell or Python scripts for repetitive administrative tasks.
• Maintain documentation for configurations, processes, and system inventories.
• Create Standard Operating Procedures (SOPs) and technical guides.
  

Technical Skill Requirements

Category

Skills / Tools

Operating Systems

File System & Storage

Performance & Monitoring

Kernel & Patching

Networking

Virtualization

Scripting

Security

Backup & Recovery

Logging & Analysis

Version Control / Automation (optional)

Soft Skills

• Strong troubleshooting and analytical skills.
• Excellent written and verbal communication.
• Good understanding of ITIL-based incident/change management processes.
• Team-oriented, proactive, and customer-focused mindset.
• Ability to work in rotational shifts and on-call support.
  

Qualification

• Education: B.E. / B.Tech in Computer Science, Information Technology, or related field.
• Certifications (Preferred):
• Red Hat Certified System Administrator (RHCSA) or RHCE
• VMware Certified Professional (VCP) (preferred)
• Linux Foundation Certified Engineer (LFCE)