By default, systemd will use a 1min 30sec timeout when starting and stopping units.
To change this default, all you need to do is edit the
You'll see several commented out items. Find the following lines:
Uncomment them and change them to whatever you want the new timeouts to be.
You don't want to set these too low. Otherwise, systemd may not have enough time to safely start amd stop units (for example: properly mounting/unmounting filesystems).