1st thing to do: BACKUP YOUR HOME.
I can't say it louder... basically undoing encryption is equivalent to resetting (
rm -rf) your home, which is in fact hidden by a mount.
2nd step: log out of any desktop manager and go to a virtual console (Ctrl + Alt + F3)
Finally, for details:
In the event that you want to remove your eCryptfs Private Directory setup,
you will need to very carefully perform the following actions manually:
Obtain your Private directory mountpoint
PRIVATE= cat ~/.ecryptfs/Private.mnt 2>/dev/null || echo $HOME/Private
Ensure that you have moved all relevant data out of your
Unmount your encrypted private directory
Make your Private directory writable again
chmod 700 $PRIVATE
Note: This is very permanent, be very careful.
rm -rf $PRIVATE ~/.Private ~/.ecryptfs
Uninstall the utilities
sudo apt-get remove ecryptfs-utils libecryptfs0
I would say step 5 is a bit wrong : there's no need to delete
$PRIVATE, which was for me my home....
.ecryptfs deletion, just restore your home :]