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What does UUID stand for in Linux fstab file?
UUID on Linux fstab file. UUID stands for Universally Unique IDentifier and it is used in Linux to identify disk in the /etc/fstab file. This way, the order of the disk in the motherboard can be changed, not affecting the mount point they will have.
How does the fstab file in Linux work?
Each line in the file describes a filesystem, and contain fields used to provide information about its mountpoint, the options which should be used when mounting it etc. Each field can be separated by another either by spaces or tabs. Let’s analyze each field and its role in an entry.
How does the UUID work in Linux ext2 / ext3?
Linux’s ext2/ext3 filesystem uses UUID to identify partitions. As a sesonded UNIX admin I have to deal with various data storage technologies such as SAN, iSCSI, DAS, scsi disks volumes. Sometime you may need to move storage from one device to another and updating /etc/fstab can be pain in a$$.
When to use CIFs as a fstab field?
In case of a remote filesystem we can use, for example cifs as the value of this field if the filesystem is shared via samba or nfs if it is shared via the Network File System. In the case of our example, we know the sdb1 device is formatted with the ext4 filesystem, therefore our fstab entry becomes:
How are partuuids and UUIDs created in Linux?
The 32-bit disk signature is used in place of a PTUUID, and PARTUUID s are created by adding a dash and a two-digit partition number to the end of the disk signature. Thanks for contributing an answer to Unix & Linux Stack Exchange!
What are the UUIDs for ext2 and ext3?
UUID=340cf4e2-4ee7-490c-a169-5045ebff4fac / ext3 defaults 0 1 UUID=37ea6741-c1b0-4297-9f23-b36417b3c109 swap swap defaults 0 0 UUID=5b0a6c7b-d936-4470-a645-2b68db32d2c1 /boot ext2 defaults 0 1 UUID=6db36bd8-0778-4b35-a0bd-66487002cbe0 /home ext3 defaults 0 1