How to extend an EXT4 partition using parted and resize2fs - ZirveSunucum Information
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How to extend an EXT4 partition using parted and resize2fs

Please do not forget to take backups before the process.

root@host:~# parted /dev/sda
GNU Parted 3.2
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) resizepart 1                                                  
Warning: Partition /dev/sda1 is being used. Are you sure you want to continue?
Yes/No? Yes                                                            
End?  [275GB]? -0                                                      
(parted) quit                                                          
Information: You may need to update /etc/fstab.

root@host:~#

Hint:

  • resizepart 1 to resize /dev/sda1
  • -0 resizes it to the end of the disk. - Indicates that it should count from the end of the disk, not the start. This makes -0 the last sector of the disk - which is suitable when you want to make it as big as possible.

If we type df -H it will still showing the old size:

root@host:~# df -H
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       271G  240G   18G  94% /
udev             11M     0   11M   0% /dev
tmpfs           1.3G  8.8M  1.3G   1% /run
tmpfs           3.2G   25k  3.2G   1% /dev/shm
tmpfs           5.3M     0  5.3M   0% /run/lock
tmpfs           3.2G     0  3.2G   0% /sys/fs/cgroup
root@host:~#

Secondly, we need to use resize2fs to extend the volume:
(The file system meta information needs to indicate the size of the disk, and resize2fs updates this.)

 

root@host:~# resize2fs /dev/sda1
resize2fs 1.42.12 (29-Aug-2014)
Filesystem at /dev/sda1 is mounted on /; on-line resizing required
old_desc_blocks = 16, new_desc_blocks = 29
The filesystem on /dev/sda1 is now 117964544 (4k) blocks long.

root@host:~#

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