Knows managing and configuration of Apache, Nginx, Squid Proxy, DNS, Samba servers. Having good command in linux like user permissions, managing logs, system management, Packages etc. Installation of Magento, Wordpress, Joomla. Installation pf Antivirus (Clamav). Firewall, VPS, Virtualization etc. Migrating Servers, Cpanel SSL certificate iinstallation Server Installation & Configuration. Mysql Database. SSH, SFTP, FTP. installation and configuration of Git & SVN. Migration of hosted website from one server to another server. Optimization of websites. Installation of all Linux Distro and Windows OS.
What else you have problem will talk in chat.