1.Troubleshooting OS issue. 2.Update, Migration, and backup of service and application on the server. 3.Deployment of new products 4.Cpanel & Whm support and troubleshooting. 5.Linux server installation, configuration, troubleshooting. 6.SMTP, Zimbra, Exim mail troubleshooting. 7.Mysql , Apcahe tuning. 8.Domain and DNS setting 9.Working with Query (SQL).