Hi Todd, Did you create a file journal (mkfs...) after you executed the command?: > # cryptsetup luksOpen /dev/sdb1 lin-bak Basic steps are: 1) cryptsetup luksFormat /dev/xyz 2) cryptsetup luksOpen /dev/xyz abc <---then verify it in /dev/mapper 3) mkfs.ext4 /dev/mapper/abc <--- i like to use ext4. Do research on this journal if you're not clear. Now that we got it settled. Come the fun part- automounting: 4) configure your /etc/fstab 5) then configure your /etc/crypttab Before you reboot your machine, do a tested mount: >mount -a -Tam On Sun, Jul 29, 2012 at 7:37 PM, Todd And Margo Chester < [log in to unmask]> wrote: > Hi All, > > I can set up "/dev/mapper/lin-bak" with > > # cryptsetup luksOpen /dev/sdb1 lin-bak > > but it disappears after I reboot. This messes up my > crypttab/fstab. Any idea what I am doing wrong? > > Many thanks, > -T >