Learn to deploy enterprise-class databases such as MySQL, MSSQL, MongoDB etc.

Tutorials on creating a virtual environment using hypervisors such as Proxmox VE, Hyper-V, VMware, etc. 

Tutorials on anything networking including switches, cabling, monitoring tools, etc. 

HOW-TOs on Storage systems such as Ceph, ZFS, Gluster etc. Learn how to deploy enterprise-grade big data storages.

HOW-TOs on web coding and CMS such as Joomla, WordPress, Drupal etc.