Virtual Linux based web server installation: - CentOS 5, 6, 7 / Debian / Ubuntu 12.04, 14.04,16.04 installation. - WHM / Parallels Plesk Panel / DirectAdmin configuration. - Firewall configuration. - Apache web server configuration. - MySQL configuration. - Custom Linux Shell sripting. - Email server configuration. - Custom Cron job configuration. - DNS server conf.