I installed Ubuntu 11.10 with the alternate CD and encrypted the whole system (except boot) with the encrypted LVM. Update 2020: Encrypted LVM can be selected at the Installation type step of the Ubuntu install, click on Advanced features and choose Use LVM and Encrypt …
Everything works great as before, but I would like to change the password of the encrypted LVM. I tried to follow the Tips and Tricks of this article, but it does not work.
sudo cryptsetup luksDump /dev/sda5
It says: "Device /dev/sd5 doesn't exist or access denied."
I thought the encrypted partition is /dev/sda5.
Any help how to change the password?