Learn all about apt-get including how to deal with the dreaded cant release lock error
Learn how to create normal and system users/groups and everything else associated with them
5 practical examples of using the find command
Learn how to use rsync to transfer files between servers
Secure Copy. Learn how to use Secure Copy to transfer files between servers
Learn the difference between .profile and .bashrc and how to use them to add paths to your system
Learn about gpg and encrypting and decrypting files and key value pairs
Learn how to mount external network drives in Ubuntu
Figure out if anyone is logged into your system or accessing applications on your server
Learn how to create ssh keys
Learn about the basic commands to use with systemctl
Learn how to use TAR - archiving files and extracting them