best way to copy usr directory
I made my original /usr directory too small and it is pretty full. I managed to free some space on another drive and create a partition named /testusr that's twice as big and mount it on startup.
How would you recommend I copy /usr to /testusr and then make it so testusr is the new usr from here on out? Also, I'd like to regain the space in the now "old" usr for something else.
I tried two things:
cp -p -r /usr /testusr
-- resulted, after a long time, of /usr directory in /testusr
mount --move usr testusr
-- worked, but upon rebooting testusr was empty again
I'm sure the cp may be the way to go (WITH SOME MANIPULATION), and then going with a change to /etc/fstab afterwards, but I wanted to know if there was a foolproof way of doing this.