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 or clicking on the "stop button".
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.