If you have the following fstab entry and want to mount the partition using the UUID instead of device name, you just need to add UUID= followed by you partition’s UUID in your fstab and you’re done.
/dev/sda4 /home ext4 defaults 0 2
The following is an example of same entry, using UUID.
UUID=860e4946-19a2-40ee-837a-4eca537b0ec1 /home ext4 defaults 0 2
Most major Linux distributions create and assign UUID on disk partitions during system installation, which is then used as an identifier to mount the partition in /etc/fstab. Once set, …
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