IT skills
Operative System
CentOS, RedHat, Ubuntu, Debian
Shell
Bash, ZSH, CSH, SED, AWK, SSH, PXE
Database
MySQL, MariaDB, PostgreSQL, SQL Server, Sybase
Scripting
Ansible, KickStart, Python, Bash, Batch, PowerShell
Virtualization
Docker, VirtualBox, VMWare, VSphere
Networking
Proxy, DNS, Firewall