Job Description:: UNIX/Linux Administration - Manage, configure, and maintain UNIX/Linux systems (RHEL, CentOS, Ubuntu, AIX, or Solaris depending on environment). - Perform routine OS patching, kernel upgrades, system tuning, and security hardening. - Monitor system performance and troubleshoot OS-level issues across compute environments. - Manage user accounts, file systems, NFS, packages, permissions, and system services. - Support shell scripting for automation and maintenance tasks (Bash, KS