I'd try:
ecryptfs-setup-private --undo
But other user suggest a longer method:
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-F1) Finally : for details :
ecryptfs-setup-private --undo
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 $PRIVATE directory
Unmount your encrypted private directory
ecryptfs-umount-private
Make your Private directory writable again
chmod 700 $PRIVATE
Remove $PRIVATE, ~/.Private, ~/.ecryptfs Note: THIS IS VERY PERMANENT, BE VERY CAREFUL
rm -rf $PRIVATE ~/.Private ~/.ecryptfs
Uninstall the utilities (this is specific to your Linux distribution)
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....
After .Private and .ecryptfs deletion, just restore your home :]