what is UUID naming for devices?

[David Koski]

On Sunday 08 July 2007 14:09, Brian Fahrlander wrote:
> SteVe Cook wrote:
> > Ari Sarkar wrote:
> >> Hi all,
> >>
> >> I use ubuntu (and recently dual-boot with debian) since April this year.
> >> I don't use windows anymore, in fact i don't need to. I've learned a lot
> >> in Linux in these days.
> >> Recently I found in ubuntu "/etc/fstab", some UUID for my mounted
> >> partition rather than "/dev/sda1" etc.
> >>
> >> I found in internet that it has some advantages.
> >>
> >> My question: I have a common partition for data (xfs formatted) which I
> >> want to access from both ubuntu and debian. And that partition should
> >> also automatically mount at boot with user can read/write without going
> >> sudo.
> >>
> >> How can I achieve this using UUID naming at "/etc/fstab"?
> >>
> >> my current disk structure:
> >> /dev/sda1: reiserfs (ubuntu)
> >> /dev/sda2: swap (common)
> >> /dev/sda3: reiserfs (debian)
> >> /dev/sda4: xfs (common accessible partition)
> >>
> >> right now my fstab has the following line for xfs partition, what should
> >> I change ?
> >> /dev/sda4       /media/xfs      xfs     defaults    0  1
> >> v
> >
> > Can't really see any great advantage myself, just a lot of fiddling
> > around when a new hard disk is added. But
> >
> > vol_id /dev/sda4
> >
> > will give you the UUID, then you replace /dev/sda4 with
> >
> > UUID=(result from vol_id)
>
>     Ya mean like UUID=`vol_id` ?
>
>     Man, I'm SUCH a Unix nerd...


Sorry, my bad:

/lib/udev/vol_id

..is the command.

man vol_id

Regards,
David