[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: UUID - autmatically entries?

On 20110521_184436, Hans-J. Ullrich wrote:
> Hi all, 
> during an update all devices were changed from /dev/sdX to its UUID.
> This included /etc/fstab and /etc/crypttab. Does somebody know, which package 
> did the changes? As I had to reinstall and used my old configurations (backup), 
> my UUIDs are now wrong. Of course, I can edit all files manually, but if a 
> script or a package does that automaticaly, it would be easier and avoid 
> errors (i.e. typos).
> Just another question: Can UUIDs be changed or must they stay forever? (I saw 

Yes, they can be changed. Use the -U option in either mkfs.ext3 to set
a particular UUID while making the fs, or in tune2fs to overwrite an
existing UUID with one that is more to your liking. If you maintain a
small database of UUID values for your disks, you might be able to
automate. Or look into establishing for yourself a policy of using
LABEL on all your disk partitions.

The install program seems to automatically rewrite UUIDs if you ask it
to erase a partition. IMHO, the method for handling disk naming is
still a work in progress. In the meantime, my particular kluge
involves using labels. They are shorter to type and easier to remember.

My understanding is that a UUID is just a string of hex characters of
the defined length and with embedded hyphens at the defined internal
locations. Generate a half a dozen and they are almost certainly all
different, even if you are using a very bad random number generator.
That they are all different is what makes them useful. The problem is
highly over intellectualized.


> the application "uuid-gen", which creates a new one, but seems not to make 
> them active)
> Thanks for any hints.
> Cheers
> Hans
> -- 
> To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org 
> with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
> Archive: [🔎] 201105211844.37661.hans.ullrich@loop.de">http://lists.debian.org/[🔎] 201105211844.37661.hans.ullrich@loop.de

Paul E Condon           

Reply to: