Linux System Administrator

Job Description Linux System Administrator (L2 )

Role: Linux Administrator / Linux + Veritas Cluster Engineer

Experience: 410 Years

Location: Production Support / 24x7 Environment

Employment Type: Full-time

Role Overview

We are looking for an experienced Linux Administrator with strong troubleshooting skills in production environments.

The candidate will be responsible for Linux server administration, performance tuning, patching, storage management, and high-availability clustering (Veritas).

The role requires hands-on expertise in incident handling, change management, and root cause analysis in enterprise environments.

Key Responsibilities

Linux Administration

• Manage Red Hat / Linux production servers
• Perform user, permission, and process management
• Monitor system health and performance
• Troubleshoot CPU, memory, disk, and network issues
• Perform server builds, migrations, and decommissioning

Performance Troubleshooting

• Analyze CPU and memory spikes
• Identify high resource consuming processes
• Provide historical usage analysis using monitoring tools
• Support application teams during performance incidents

Patching & Lifecycle Management

• Perform OS patching and security updates
• Validate pre-checks and post-checks
• Handle reboot and non-reboot patching
• Apply version-specific upgrades and exclusions
• Ensure production change compliance

Storage & File System Management

• Troubleshoot full filesystem issues
• Extend and manage filesystems
• Perform disk expansion and LVM configuration
• Add and manage new disks in production systems

Boot & System Recovery

• Troubleshoot boot failures
• Understand boot sequence and startup services
• Perform system recovery activities

Cluster & High Availability (Veritas Preferred)

• Manage Veritas Cluster Server environments
• Handle failover and fencing scenarios
• Perform cluster patching and compatibility checks
• Support clustered application environments

Production Change & ITIL Processes

• Execute approved change requests
• Perform rollback and recovery planning
• Participate in incident and problem management
• Support emergency changes and vulnerability remediation

Required Technical Skills

Core Linux

• Linux administration and troubleshooting
• Process and performance monitoring
• Package management and repositories
• Boot process understanding

Storage & Filesystem

• LVM configuration and extension
• Disk management and recovery
• Swap and memory tuning

Monitoring Tools

• System performance analysis tools
• Historical performance investigation

Patching & Repositories

• Server patching lifecycle
• Repository subscription and management
• Security update implementation

Preferred Skills (Good to Have)

• Veritas Cluster Server (VCS)
• Veritas Volume Manager (VXVM)
• Cluster filesystem concepts
• High availability and failover mechanisms
• Cloud VM troubleshooting

Operational Skills

• Production support experience
• Incident handling (P1/P2/P3)
• Root Cause Analysis (RCA)
• Documentation and change tracking
• Coordination with application and DB teams

Candidate Profile

• Strong troubleshooting mindset
• Experience in 24x7 support environments
• Ability to work during maintenance windows
• Good communication with cross-functional teams

Key Competency Areas (Interview Focus)

High Priority

• Boot process
• Patching lifecycle
• Disk full troubleshooting
• LVM extension
• CPU performance analysis
• Change management

Intermediate

• Performance history analysis
• Swap tuning
• Filesystem security

Advanced

• Cluster compatibility & fencing
• UID/GID handling in production
• Version locking during upgrades