▷ [Urgent Search] Linux System Administrator

Job Description Job Title: Linux System Administrator / Infrastructure Engineer Experience Required: 45 Years Location: Bangalore Department: IT Infrastructure Shift: Rotational (24x7 Support) Job Summary We are looking for an experienced Linux System Administrator responsible for managing, maintaining, and troubleshooting enterprise Linux environments. The ideal candidate should have hands-on experience with RHEL and Ubuntu servers, system performance tuning, LVM partition management, kernel upgrades, and virtualization technologies like VMware or RHEV. The role involves ensuring high availability, security, and efficiency of Linux systems across production and virtual infrastructures. Key Responsibilities - Linux Server Administration - Install, configure, and maintain Linux operating systems (RHEL, Ubuntu). - Manage system services such as SSH, DNS, NTP, and syslog. - Perform OS patching, upgrades, and health checks. - Troubleshoot OS, network, and application-related issues. - Filesystem & Storage Management - Create and manage partitions using LVM (Logical Volume Manager). - Extend or shrink file systems as per requirements. - Manage mount points and handle disk utilization issues. - Work with storage teams for volume provisioning and integration. - Kernel & System Updates - Perform kernel upgrades, patching, and reboot validations. - Maintain system stability during updates and rollback in case of failures. - Monitor system logs for kernel or hardware-related issues. - Server Architecture & Performance - Understand server hardware architecture CPU, memory, storage, and NICs. - Analyze and optimize system performance using tools like top, iostat, vmstat, and sar. - Troubleshoot high load or performance degradation issues. - Virtualization & Infrastructure Management - Manage virtualized environments (VMware, RHEV). - Create and configure virtual machines, snapshots, and resource allocations. - Troubleshoot virtual machine connectivity and performance issues. - Support migration and backup of virtual instances. - System Security & Compliance - Implement OS-level security (firewall, SELinux, user privileges). - Ensure compliance with patching and access control policies. - Maintain sudoers configurations and manage user/group permissions. - Backup & Recovery - Schedule and monitor system backups. - Perform system recovery and restore activities. - Validate backup integrity and retention policies. - Automation & Documentation - Write shell or Python scripts for repetitive administrative tasks. - Maintain documentation for configurations, processes, and system inventories. - Create Standard Operating Procedures (SOPs) and technical guides. Technical Skill Requirements CategorySkills / ToolsOperating Systems RHEL 7/8/9, Ubuntu 18.04/20.04 File System & Storage LVM, ext4, XFS, fdisk, parted Performance & Monitoring top, ps, vmstat, iostat, sar, dmesg Kernel & Patching yum, dnf, rpm, apt, grub Networking ifconfig, nmcli, bonding, routing, firewalld Virtualization VMware vSphere, RHEV (Red Hat Enterprise Virtualization) Scripting Bash, Shell, Python (basic) Security SELinux, sudoers, system hardening Backup & Recovery rsync, tar, cron-based backup, snapshot recovery Logging & Analysis journalctl, /var/log/messages, syslog Version Control / Automation (optional) Git, Ansible (basic understanding) Soft Skills - Strong troubleshooting and analytical skills. - Excellent written and verbal communication. - Good understanding of ITIL-based incident/change management processes. - Team-oriented, proactive, and customer-focused mindset. - Ability to work in rotational shifts and on-call support. Qualification - Education: B.E. / B.Tech in Computer Science, Information Technology, or related field. - Certifications (Preferred): - Red Hat Certified System Administrator (RHCSA) or RHCE - VMware Certified Professional (VCP) (preferred) - Linux Foundation Certified Engineer (LFCE) Skills: infrastructure,upgradation,linux,kernel,management,security,rhel