Going back to a previous directory in the Linux terminal

 A little cd trick to cd back in Linux terminal history:

 cd -  

So useful I had to share!

Connecting to a VPN from the command line in Linux Mint / Ubuntu

Set up the VPN using the Network Manager applet, then open a Terminal. The command to connect to a VPN is:

 nmcli con up uuid <your-uuid-here> 

To find out the UUID of the VPN connection, use:

 nmcli -p con list

The command to disconnect from a VPN is:

 nmcli con down uuid <your-uuid-here>