Linux Administrator – L2

Job Description:

The Linux Administrator (L2) will be responsible for the installation, configuration, monitoring, and maintenance of Linux servers across production and non-production environments. The role involves providing day-to-day operational support, troubleshooting, and performance optimization, while ensuring high availability, security, and compliance of systems.
Key Responsibilities:

• Core Administration & Monitoring
  • Installation & configuration of Linux Operating Systems.
  • Hardening of Linux OS and patch installation.
  • Health monitoring of Linux servers (CPU/Memory/Disk/System Load).
  • OS reboot, shutdown, and start-up procedures.
  • OS log management (rotation, purging) and monitoring of system logs.
  • Disk management, file system management, user & group management.
  • Configuration of network, NTP, and OS parameters.
  • Installation of RPMs/software packages (Java, sudo, lsof, etc.).
  • Management of cron jobs.
• Support & Coordination
  • First-level coordination with Application Support and Development teams for OS-related issues.
  • OS support during DB patching, application patching, and hardware maintenance.
  • Troubleshooting and resolution of hardware, software, and communication problems.
  • Logging calls with hardware OEM/AMC vendors for replacement of failed parts.
  • Logging and coordination with software OEM/ATS vendors for software-related issues.
  • Provide L2-level support and resolution of issues escalated by L1.
• Advanced Administration
  • Linux Kernel upgrade and OS migration.
  • Installation/configuration of network services (DNS, NFS, SAMBA, YUM server).
  • SAN storage-related configuration in Linux servers.
  • Support for DC/DR switchover and switchback activities.
  • Installation/configuration of Apache and Tomcat servers.
  • Performance monitoring, tuning, automation, and optimization activities.
  • RedHat PCS cluster configuration, troubleshooting, and support.
• Architecture, Compliance & Management
  • Planning & designing deployment architecture for Linux servers.
  • Setup and administration of high availability and disaster recovery (HA/DR) environments including clustering, failover, fencing, and recovery.
  • Capacity planning and performance statistics analysis.
  • Formulation of backup and recovery strategies.
  • Audit and compliance support.
  • Documentation, inventory maintenance (servers, users, groups).
  • Team/resource management and coordination with client/vendors/other support teams.

  Skills Required:

  • Strong expertise in Linux administration (RHEL/CentOS/Oracle Linux)
  • Hands-on with Apache, Tomcat, DNS, NFS, SAMBA, YUM, SAN configuration
  • Good troubleshooting and problem-solving skills
  • Experience with clustering technologies (RedHat PCS cluster)
  • Strong knowledge of performance tuning and OS-level security
  • Excellent analytical and communication skills
  • Good to Have: Knowledge of scripting (Shell/Python/Perl) for automation, Experience with ITIL-based support processes, Exposure to cloud or containerized environments (Docker/Kubernetes)
  • Preferred Skills / Certifications: Red Hat Certified System Administrator (RHCSA) / Red Hat Certified Engineer (RHCE)

  Educational Qualification:

  BE/B.Tech in Computer Science/IT or MCA

  Project Management: