Below, you will find instructiosn on how to stop machines in the OffSec Learning Platform:
Stopping a machine when connected through KALI
The Kali Linux instance and the PG machine can be closed by clicking the "X" on the upper right corner.
Stopping a machine when connected through VPN
The same command used to start a machine is used to stop a machine.
The command to stop is located on the far right of the lab machine row. Simply click the start/stop command button.