There is no default directory "/var/mapper."  It is supposed to be
/dev/mapper.
Can you do all of that steps again, but before you reboot, can you please
give me the output of the following files:

>cat /dev/mapper
>cat /etc/fstab
>cat /etc/crypttab



On Sun, Jul 29, 2012 at 10:59 PM, Todd And Margo Chester <
[log in to unmask]> wrote:

> On Sun, Jul 29, 2012 at 7:37 PM, Todd And Margo Chester
>> <[log in to unmask] <mailto:[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
>>
>
>
> On 07/29/2012 06:15 PM, Tam Nguyen wrote:> 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
> >
>
>
> Yes, did all that.   I can mount too.  But, when I reboot,
> lin-bak disappears from /var/mapper.   AAAHHHH!
>
> -T
>