Unix / Linux Basics and Commands / RedHat Linux

Key Responsibilities:

• Install, configure, and maintain Red Hat Enterprise Linux (RHEL) servers and other Linux/Unix systems.
• Perform routine system maintenance, updates, patches, and security hardening.
• Manage users, groups, permissions, and access controls using standard Unix/Linux commands.
• Monitor system performance and ensure system uptime and reliability.
• Create and maintain shell scripts for task automation and monitoring.
• Configure and maintain system services such as SSH, NFS, Cron, DNS, DHCP, FTP, etc.
• Manage storage systems, partitions, file systems (ext4, xfs), and LVM.
• Handle backups and recovery processes using enterprise tools or shell scripting.
• Troubleshoot hardware, software, and networking issues in Unix/Linux environments.
• Support security policies such as SELinux, firewall rules, and auditing.
• Collaborate with other teams for system integration, deployment, and support.
• Maintain documentation of system configuration, procedures, and troubleshooting steps.

Required Skills & Qualifications:

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 25 years of experience in Unix/Linux systems administration, preferably in RHEL environments.
• Strong hands-on experience with Linux command line tools and bash shell scripting.
• Solid understanding of user and permission management, file system hierarchy, and Linux fundamentals.
• Experience with YUM/DNF, package management, and service management using systemctl.
• Familiarity with networking basics and tools like netstat, ss, ping, scp, and iptables.
• Understanding of log management, troubleshooting (journalctl, dmesg, /var/log/*).
• Knowledge of security practices, firewalls, and SELinux.