Comment 90 for bug 953875

I was in a situation similar to akwala's, post #13 (http://unix.stackexchange.com/questions/1367/how-to-test-swap-partition). In my case I use Mint 17 Rebecca (based on Trusty).

In this case, both "encrypt home" and "encrypt the full partition" have been selected during installation.

I believe that the need for an encrypted swap in this case is not that important if the system is to be used by a single user: the swap partition (in akwala's case, /dev/mapper/kubuntu--vg-swap_1) resides in an encrypted disk anyway.

Of course, one could choose to reinstall and select only "encrypt the full partition" and not "encrypt home". In my particular case, I am interested in also encrypting home because I use rsync to back up my (encrypted) home dir (i.e., /home/.ecryptfs/my_username/.Private) to an untrusted machine.

So, my fix consists in configuring my fresh Mint 17 installation to use /dev/mapper/mint--vg-swap_1 (which is encrypted) as a non-encrypted swap partition:

* Format the swap partition:
sudo mkswap /dev/mapper/mint--vg-swap_1

(for ubuntu, replace mint--vg-swap_1 by ubuntu--vg-swap_1, for other releases, run "sudo fdisk -l" and adapt the name accordingly)

* Edit /etc/fstab:
  - comment out the line starting with: /dev/mapper/cryptswap1
  - if not there, add a line for mounting mint--vg-swap_1 as a regular swap partition:
/dev/mapper/mint--vg-swap_1 none swap sw 0 0
(if needed, replace mint--vg-swap_1 as described above)

* Edit /etc/crypttab and comment out the line starting with: cryptswap1

* Reboot

* After reboot verify that the swap was mounted:

$ swapon -s
Filename Type Size Used Priority
/dev/mapper/mint--vg-swap_1 partition 4075516 0 -1

$ free
             total used free shared buffers cached
Mem: 4000156 1266520 2733636 15452 25604 524712
-/+ buffers/cache: 716204 3283952
Swap: 4075516 0 4075516

$ sudo swapoff /dev/mapper/mint--vg-swap_1

(no errors)

$ sudo swapon -a

(no errors)