Linux System Administrator

Position:

Job Summary

Linux Administrator

Key Responsibilities

• Install, configure, administer, and troubleshoot

  Ubuntu and RHEL/CentOS/Rocky Linux

  servers.
• Install and manage virtualization platforms including

  KVM and Proxmox VE

  .
• Create, configure, clone, migrate, snapshot, back up, and restore

  Virtual Machines (VMs)

  .
• Configure VM resources including CPU, memory, storage, network interfaces, bridges, and VLANs.
• Perform Linux installation, OS upgrades, patch management, package management, and security updates.
• Develop and maintain

  Bash/Shell and Python scripts

  for automation, monitoring, deployment, backup, and routine administrative activities.
• Troubleshoot Linux OS issues related to:
• CPU, memory, disk, and system performance
• Boot and systemd/service failures
• Filesystems, LVM, RAID, and storage
• Network interfaces, bonding, bridging, VLANs, routing, DNS, and firewall
• User, group, SSH, sudo, and permission-related issues
• Configure and troubleshoot services such as

  SSH, NTP/Chrony, DNS, DHCP, NFS, Samba, HTTP/HTTPS, and SFTP

  .
• Monitor server health, resource utilization, logs, processes, and services and perform root-cause analysis.
• Configure and manage Linux networking, including

  static routes, bonding, bridges, VLANs, NAT, iptables/nftables/firewalld

  .
• Manage storage using

  LVM, RAID, NFS, iSCSI, and local/network storage

  .
• Implement server hardening, access controls, SSH security, firewall policies, and OS-level security best practices.
• Perform backup, restoration, disaster recovery, and VM recovery activities.
• Maintain technical documentation, configuration records, troubleshooting procedures, and operational SOPs.
• Provide L2/L3 support for Linux infrastructure and coordinate with application, network, security, and development teams.

Required Technical Skills

Mandatory Skills:

• Ubuntu Linux and RHEL administration
• KVM and Proxmox virtualization
• VM provisioning and lifecycle management
• Bash/Shell scripting
• Linux troubleshooting and performance analysis
• Linux networking and storage
• LVM and RAID
• SSH and user/access management
• Systemd and Linux service management
• Package management using APT, YUM and DNF
• Log analysis and root-cause troubleshooting