Re: subvol copying

[Gabriel de Perthuis <g2p.code@gmail.com>]

> A user of a workstation has a home directory /home/john as a subvolume.  I 
> wrote a cron job to make read-only snapshots of it under /home/john/backup 
> which was fortunate as they just ran a script that did something like
> "rm -rf ~".
> 
> Apart from copying dozens of gigs of data back, is there a good way of 
> recovering it all?  Whatever you suggest isn't going to work for this time 
> (the copy is almost done) but will be useful for next time.
> 
> Should I have put the backups under /backup instead so that I could just 
> delete the corrupted subvol and make a read-write snapshot of the last good 
> one?

You can move subvolumes at any time, as if they were regular directories.

For example: move the backups to an external location, move what's left
of the home to another location out of the way, and make a snapshot to
restore.