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How to rename /dev/sdax(partitions) in Linux

rated 0 times [ 2] [ 0] / answers: 1 / hits: 15843 / 3 Years ago, sun, may 23, 2021, 8:56:37

I made a partition like /part on my machine with some important data...

But I can't stand the name of it...

I want a clear solution to resolve it and change the name of it to for example /test...

As you see this is my /etc/fstab information:

# /etc/fstab: static file system information.

#

# Use 'blkid' to print the universally unique identifier for a

# device; this may be used with UUID= as a more robust way to name devices

# that works even if disks are added and removed. See fstab(5).

#

# <file system> <mount point>   <type>  <options>       <dump>  <pass>

proc            /proc           proc    nodev,noexec,nosuid 0       0

# / was on /dev/sda5 during installation

UUID=a21a99c4-e5b4-4197-ac5e-80d0fab1f30c /               ext4    errors=remount-ro 0       1

# /home was on /dev/sda6 during installation

UUID=2e37d833-ca34-4fa7-a5d8-a4423a5af9bc /home           ext4    defaults          0       2

# /part was on /dev/sda7 during installation

UUID=47e6e0b1-0e57-4184-a378-375b9ce315c5 /part           ext4    defaults          0       2

# swap was on /dev/sda1 during installation

UUID=485e9f78-4dce-4404-af4e-f43985525264 none            swap    sw                0       0

The point is: My information are important and I scare to manipulate it without being sure...
I want a safe solution...

How is it possible?

Thank you in advance

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2 Years ago

answered 3 Years ago arsleyeuth · Accepted Answer

Unmount the partition:
```
# umount /part
```

Rename the directory after making sure it's not mounted:

# mountpoint /part &>/dev/null || mv /part /best_name_ever

Edit /etc/fstab to replace /part with /best_name_ever

Remount the partition:
```
mount /best_name_ever
```

The # is of course meant to represent your root prompt, not actual input to be typed in.

To test the safety of this solution or any other one on dummy data

The following instructions are (in part) stolen from Virtual Filesystem: Building A Linux Filesystem From An Ordinary File.

Create an ordinary file with a size of 20 MB (for example):

$ dd if=/dev/zero of=dummy_fs bs=1k count=20480 # 20480 = 20 * 1024

Create an ext4 filesystem on your file:

$ /sbin/mkfs -t ext4 dummy_fs       

mke2fs 1.42.5 (29-Jul-2012)

dummy_fs is not a block special device.

Proceed anyway? (y,n) y

... # Output of mkfs

Mount the filesystem image, create some dummy data on it and test the solution:

# mkdir /tmp/testmount

# mount -o loop dummy_fs /tmp/testmount

# touch /tmp/testmount/{blah,bleh} # Create dummy data

# ls /tmp/testmount

blah bleh lost+found

# umount /tmp/testmount

# mountpoint /tmp/sexy_name &>/dev/null || mv /tmp/testmount /tmp/sexy_name

# mount -o loop dummy_fs /tmp/sexy_name

# ls /tmp/sexy_name # to ensure your data is intact:

blah bleh lost+found