X-Files Wiki

This guide asumes gparted or similar has been used to extend the disk first.

vgdisplay

You will get an outpout similar to this one.

--- Volume group ---
  --- Volume group ---
  VG Name               ubuntu-vg
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <99.00 GiB
  PE Size               4.00 MiB
  Total PE              25343
  Alloc PE / Size       5120 / 20.00 GiB
  Free  PE / Size       20223 / <79.00 GiB
  VG UUID               0dJIdX-owJK-tT6W-E5CG-VbVu-1pZU-OqA9oe

Here we have 79 GB free as shown by this line:

"Free PE / Size 20223 / 79.00 GiB"

Let's have a look at the logical volumes.

lvdisplay

You will get an outpout similar to this one.

  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/ubuntu-lv
  LV Name                ubuntu-lv
  VG Name                ubuntu-vg
  LV UUID                r4t303-MwxK-MYvc-Ufdv-rx2K-sN49-oettLL
  LV Write Access        read/write
  LV Creation host, time ubuntu-server, 2021-06-01 11:07:11 +0000
  LV Status              available
  # open                 1
  LV Size                20.00 GiB
  Current LE             5120
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

We will expand "/dev/ubuntu-vg/ubuntu-lv" as shown by this line:

"LV Path /dev/ubuntu-vg/ubuntu-lv"

If we want to use all availabe space we can run the following command:

lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv

If however you only want to extend with like say 5 GB use this command:

lvextend -L+5G /dev/ubuntu-vg/ubuntu-lv

Now we need to resize the file system.

resize2fs /dev/ubuntu-vg/ubuntu-lv

Note you can skip the resize2fs part by using the -r (resizefs) flag in lvextend like this:

lvextend -r -l +100%FREE /dev/ubuntu-vg/ubuntu-lv

Once done check that everything is in order.

df -H