How to Change UUID of Partition in Linux Filesystem

In this short tutorial, you are going to learn how to change the UUID of a Linux partition. This can help you in a less likely to happen scenario when the UUID of two...

Spread the love

In this short tutorial, you are going to learn how to change the UUID of a Linux partition. This can help you in a less likely to happen scenario when the UUID of two partitions are the same.

In reality, this is really hard to happen, but it is still possible, if for example you copy a partition using dd command.

What is UUID?

UUID stands for Universally Unique IDentifier of a partition. This ID is used in few different places to identify the partition. Most commonly this would be /etc/fstab.

How to Find UUID of Your Filesystems

To find the UUID of your partitions, you can use blkid command as shown.

# blkid|grep UUID

Find Partition UUID in Linux

Find Partition UUID in Linux

How to Change UUID of Your Filesystems


Changing UUID of a filesystem is fairly easy. To do this, we are going to use tune2fs. For the purpose of this tutorial, I will change the UUID on my second partition /dev/sdb1, yours may vary, thus make sure you are changing the UUID of the desired filesystem.

The partition has to be unmounted prior apply the new UUID:

# umount /dev/sdb1
# tune2fs /dev/sdb1 -U random /dev/sdb1 # blkid | grep sdb1

Change Partition UUID in Linux

Change Partition UUID in Linux

The UUID has been successfully changed. Now you can mount the filesystem back again.

# mount /dev/sdb1

You can also update your /etc/fstab if needed, with the new UUID.

Conclusion

This was a short tutorial how to change a Linux partition UUID. The scenarios to use this are very rare and chances are that you will most probably use this on a local machine.

Facebook Comments

More Stuff

2 Ways to Create an ISO from a Bootable USB in Linux In this article, we will show you how to create an ISO from a bootable USB drive in Linux. We will explain two ways to achieve this: via the command l...
Transfer.sh – Easy File Sharing from Linux Commandline Transfer.sh is a simple, easy and fast service for file sharing from the command-line. It allows you to upload up to 10GB of data and files are stored...
Bash-it – Bash Framework to Control Your Scripts and Aliases Bash-it is a bundle of community Bash commands and scripts for Bash 3.2+, which comes with autocompletion, themes, aliases, custom functions, and more...
HTTPie – A Modern HTTP Client Similar to Curl and Wget Commands HTTPie (pronounced aitch-tee-tee-pie) is a cURL-like, modern, user-friendly, and cross-platform command line HTTP client written in Python. It is desi...
Spread the love

Posted by News Monkey