Linux System Administrator

Roles & Responsibilities

• Install, configure, maintain, and troubleshoot Linux servers including RHEL, CentOS, and Ubuntu.
• Perform server administration, system upgrades, patching, and configuration management.
• Manage Linux users, groups, file permissions, sudo access, and security policies.
• Monitor server health, CPU, memory, disk utilization, processes, and system performance.
• Configure and troubleshoot services such as DNS, DHCP, FTP/SFTP, SMTP, SSH, and NFS.
• Manage filesystems, disk partitions, LVM, RAID, mounts, and storage capacity.
• Configure and maintain VMware vSphere, ESXi hosts, and virtual machines.
• Perform application and code deployment on Linux application servers.
• Troubleshoot hardware, operating system, application, and network-related issues.
• Implement server backup, restoration, and disaster recovery procedures.
• Perform log analysis and identify root causes of system and application failures.
• Configure Cron jobs and Bash/Shell scripts to automate routine administrative activities.
• Apply Linux security hardening, firewall rules, SELinux policies, and access controls.
• Coordinate with application, database, network, security, and development teams for issue resolution.
• Maintain system documentation, operational procedures, and configuration records.
• Handle incidents, service requests, changes, and problems according to ITIL processes.
• Monitor and resolve alerts using enterprise monitoring tools.
• Participate in server migration, capacity planning, and infrastructure improvement activities.
• Maintain production, development, and QA environments.
• Follow change-management, security, backup, and compliance standards.

Preferred Candidate Profile

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• Strong hands-on experience in Linux/UNIX system administration.
• Good knowledge of RHEL, CentOS, Ubuntu, and Linux server environments.
• Strong understanding of TCP/IP, DNS, DHCP, SSH, FTP/SFTP, SMTP, NFS, and VPN.
• Experience with LVM, RAID, filesystems, disk management, and server storage.
• Hands-on experience with VMware vSphere, ESXi, and virtual machines.
• Good knowledge of Bash/Shell scripting and Linux automation.
• Experience in server monitoring, troubleshooting, patch management, and performance tuning.
• Understanding of Linux security, firewall, SELinux, user access, and permissions.
• Experience with backup and recovery processes.
• Knowledge of AWS infrastructure such as EC2, S3, IAM, and CloudWatch is preferred.
• Familiarity with Apache, Tomcat, Git, Jenkins, and Docker is an advantage.
• Strong analytical and problem-solving skills.
• Good communication and stakeholder-management skills.
• Ability to work independently as well as collaborate with cross-functional teams.
• Willingness to participate in rotational/on-call support when required.

Perks & Benefits

• Competitive salary based on skills and experience.
• Performance-based incentives and annual salary reviews.
• Health insurance and employee wellness benefits.
• Paid leave, holidays, and other statutory benefits.
• Opportunities for technical training and professional certifications.
• Exposure to enterprise Linux, cloud, virtualization, and infrastructure technologies.
• Career growth opportunities within IT Infrastructure and Operations.
• Supportive and collaborative work environment.
• Opportunities to work on large-scale production infrastructure.
• Flexible work arrangements, where applicable.
• Employee engagement activities and team events.
• Learning and development programs.
• Recognition and rewards for outstanding performance.