Linux System Administrator

Key Responsibilities

• Install, configure, administer, and maintain Linux servers, primarily Red Hat Enterprise Linux (RHEL) and other supported Linux distributions.
• Perform day-to-day Linux administration, including user/group management, file systems, permissions, services, processes, packages, and system configuration.
• Manage server provisioning, configuration, upgrades, migrations, and decommissioning.
• Perform regular OS patching, vulnerability remediation, security hardening, and CIS compliance activities.
• Monitor server availability, CPU, memory, disk, filesystem, network, and overall system performance.
• Troubleshoot Linux OS, application connectivity, performance, storage, filesystem, and network-related incidents.
• Perform root-cause analysis for recurring or major incidents and implement permanent corrective actions.
• Manage LVM, filesystem expansion, mount points, NFS, and storage-related configurations.
• Support authentication and access management technologies such as LDAP, Active Directory, Kerberos, SSH, sudo, and PAM.
• Configure and troubleshoot Linux networking, including DNS, routing, firewall rules, ports, and connectivity.
• Develop and maintain Shell/Bash scripts to automate repetitive operational and administrative activities.
• Support monitoring, backup, enterprise scheduling, security, and infrastructure management tools.
• Maintain server build standards, operational procedures, architecture documentation, inventory, and technical runbooks.
• Participate in incident, problem, change, vulnerability, and capacity-management processes.
• Support disaster recovery exercises, backup/recovery validation, and business continuity requirements.
• Provide production support and support for critical incidents and planned maintenance where required.

Technical Skills:

Strong knowledge of RHEL/Linux administration, Bash/Shell scripting, system, RPM/YUM/DNF, LVM, NFS, SSH, sudo, TCP/IP, DNS, LDAP/Kerberos, performance troubleshooting, patching, vulnerability remediation, and security hardening is expected.

Experience with VMware/Nutanix, AWS or other cloud platforms, Ansible or similar automation tools, monitoring platforms, CyberArk, backup technologies, and enterprise schedulers would be advantageous.

Experience & Qualifications:

Diploma/Degree in Computer Science, Information Technology, Engineering, or a related discipline, with approximately 5+ years of hands-on Linux system administration experience in a production or enterprise environment. RHCSA/RHCE or equivalent Linux certifications are advantageous.