• Installations of various Linux flavors (Centos/RHEL/Ubuntu). • System administration activities related to OS: Linux • Installing Control Panels ( Cpanel, plesk,Zpanel,Webmin) & Taking care of server cpanel & plain server migration. Also taking care of Zimbra mail server migrations. • Configuring LAMP (Linux+Apache+Mysql+php) • Configuring and Securing Linux Servers using firewall (Iptables) and third-party tools like APF, CSF, PortSentry and blocking/attack resistant scripts. • Installation/Configuration of third party services and applications on Linux servers as requested and demanded by clients. • Installation, configuration and upgrading of MySQL server and My Sql replication (Master+slave) • Service performance tuning and tweaking Apache, PHP & MySQL. Monitoring and adding the servers and services via monitoring software such as Nagios XI and Cacti. • Troubleshooting problems related to Apache, DNS, PHP, MySQL, Exim, & Sendmail, Zimbra etc. • Managing IP Listing and Delisting. Managing and installing DNS (Bind9). • Automating server jobs like backup, load monitoring etc via Shell Scripts. • Installation of ESXI and Managing Vmware & VPS Linux servers.