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by Am4TIfIsER0ppos 692 days ago
So when I have root and home mounted because I am using the computer can I shrink them? No because they are mounted.
1 comments

The easiest way to resize the root partition is probably to boot from eg Ubuntu live/install USB stick. The home partition you can unmount (but not while non root user sessions are using it).
> reboot into another OS

As I said: garbage for snapshots

You need to do it only once (if you didn't do it at install time), not every snapshot.