Very useful! but what if i dont have a time machine?And most likely you will loose space again if you don't turn of local TimeMachine snapshots.
Right now I don't know the command, if I find I will update this post.
The next link explains it, seems to me your Time Machine was enabled somehow, it should not make local snapshots if it is disabled as you can read in this link.
https://support.apple.com/en-us/HT204015