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In this tutorial we are going to learn what is UUID and how UUID used in fstab.
Here we start now
People who are used to the new releases of Ubuntu might be aware of the thing called UUID. Because Ubuntu have completely started using UUID as the method to uniquely identify disc drives/partitions on the machine.
Now on my machine(Ubuntu 11.10), i have my fstab entries
Here you can see
Now what does that UUID thing in the image means? and why is Ubuntu guys shifting towards the UUID thing, from the normal naming conventions we previously used like
UUID stands for Universally Unique Identifiers
its an identification tag given to every device drives on the machine to uniquely identify the exact drive/partition.
How UUID’s look like
There are several major reasons for why Linux is shifting towards UUID’s these days. I will explain them in short.
Names assigned by the machine to devices are not always persistent. Sometimes attaching one more extra hard drive, will change the names previously given by the kernel.
UUID’s can assure you that the device you are trying to access is the exact device you intended
No matter what number of disks and what type of disks are attached to the machine, the kernel will uniquely identify the exact device by its unique UUID number