How to find my file system with UUIDs in F 9

notageek · #1 31st May 2008, 06:21 PM

Hello Guys,

This is my first HOWTO, and I'll make this quick and less painful.

Okay by now you may have noticed that F9 uses weird characters in your /etc/fstab to mount file system. So what are they and how do we manipulate them?

Example /etc/fstab

Code:

UUID=2113dfa3-b0b0-48e5-8764-c842320fa28c /                       ext3    defaults        1 1
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
UUID=8fa27bec-0676-47e0-9597-c09b169f875c swap                    swap    defaults        0 0
UUID=3150b901-2459-4443-a23b-2d1cfb0276af swap                    swap    defaults        0 0

How to find the partition or device associated with the UUID?

A command called findfs will help you find your partition

Code:

 # findfs UUID=2113dfa3-b0b0-48e5-8764-c842320fa28c 
/dev/sda7

How do you create new UUIDs for a partition?

Use tune2fs

Code:

 # tune2fs -U random /dev/sda8

How do we find the UUID of a partition?

Code:

# tune2fs -l /dev/sda7 |grep UUID
Filesystem UUID:          2113dfa3-b0b0-48e5-8764-c842320fa28c

What is the UUID of my reiserfs partition?

To the best of my knowledge UUIDs are only for ext2/ext3/ext4 file systems.

What does man uuid have to say about this?

Quote:

The UUID library is used to generate unique identifiers for objects that may be accessible beyond the local system.

Hope this helps

#2 31st May 2008, 07:13 PM

Why just don't run

Code:

su -
blkid

it's useful

notageek · #3 1st June 2008, 04:47 AM

Well blkid will list the ids of all your partitions at once, but yes its another way to find out UUID.