Vmware Administration, Lvm, Dns, Linux Administration, DHCP, Nfs, Firmware upgrades, Virtualization techniques, IP Management tools, User Administration using LDAP, Troubleshooting Installation maintenance and tuning of Linux Unix OS, System security patching and upgradations, Performance troubleshooting, PCS Pacemaker cluster knowledge, Linux File systems, Capacity Planning, TCP IP Routing, Linux servers in virtualized environments