Administrator installing, configuration, and troubleshooting of operating system RHEL, CentOS, Ubuntu. Perform tasks as a user administration, managing file system, taking backups, writing scripting for automation tasks. Resolve troubleshooting in networks. Check processes that consume more resources than expected using. Monitoring CPU utilization for critical processes like "JAVA", "httpd", "mysql".- Taking the system back-up to the remote server using rsync, cp tools compressing backup with tar, zip (with gzip, bzip2).- Writing shell script, bash & python to automate tasks such as transferring logs, and taking back-ups.- Company's LAN and also WAN using tools such as ping, traceroute, ip, netstat.- Changing as assign custom permissions using chmod, etc. Configuring IP addresses to the interface using nmtui (Rhel 7&8), setup (Rhel 6) tools for changing the IP of network drivers connected to the system & IP aliasing.- Mounting and unmounting partition as per the requirement & clearing cache and buffer.- Stop unwanted services on a server using kill command. Perform tasks as a user administration, managing file system, taking backups, writing scripting for automation tasks. Resolve troubleshooting in networks. Check processes that consume more resources than expected using. Monitoring CPU utilization for critical processes like "JAVA", "httpd", "mysql". Taking the system back-up to the remote server using "rsync" tools compressing backup with tar (with gzip, bzip2). - Writing shell script, bash & python to automate tasks such as transferring logs, and taking back-ups. - Company's LAN and also WAN using tools such as ping, traceroute, ip, netstat. - Changing as assign custom permissions using chmod, etc. configure IP address.