This was the output of lsblk before running parted:
sda 8:0 0 90G 0 disk └─sda1 8:1 0 40G 0 part ├─ubuntu--vg-root 253:0 0 39G 0 lvm / └─ubuntu--vg-swap_1 253:1 0 976M 0 lvm [SWAP] After adding more space to my virtual machine disk I ran the following commands to reflect the new space in the OS:
sudo parted /dev/sda resizepart 1 sudo resize2fs /dev/sda1 quit Then o got this message:
Information: You may need to update /etc/fstab. Now the output of lsblk is:
sda 8:0 0 90G 0 disk └─sda1 8:1 0 90G 0 part ├─ubuntu--vg-root 253:0 0 39G 0 lvm / └─ubuntu--vg-swap_1 253:1 0 976M 0 lvm [SWAP] But the system is still showing 42GB instead of new 90GB disk size, I think I need to do something to add the storage in ubuntu--vg-root ...
Is it because I need to update /etc/fstab? If so, how? If not then which commands should I run?
41 Answer
Your system uses Logical Volume Management (LVM). In this setup, a partition does not directly host a filesystem but an LVM physical volume. The filesystem is hosted by an LVM logical volume which is contained on one or more physical volumes.
I recreated your situation in a VM. Just doing resizepart using parted does not extend the physical volume:
$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 90G 0 disk └─sda1 8:1 0 90G 0 part ├─ubuntu--vg-root 252:0 0 39G 0 lvm / └─ubuntu--vg-swap_1 252:1 0 976M 0 lvm [SWAP] $ sudo pvs PV VG Fmt Attr PSize PFree /dev/sda1 ubuntu-vg lvm2 a-- 40,00g 44,00m So you need to extend the physical volume:
sudo pvresize /dev/sda1 The result can be checked using pvs:
$ sudo pvs PV VG Fmt Attr PSize PFree /dev/sda1 ubuntu-vg lvm2 a-- 90,00g 50,04g Then resize the logical volume. Use -r to automatically resize the contained filesystem. After the prefix /dev/mapper/, specify the logical volume name shown by lsblk below sda1:
sudo lvresize -r -l+100%FREE /dev/mapper/ubuntu--vg-root Both these operations can be done even when booted from the resized drive, you don’t need to boot a live CD.
The result:
$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 90G 0 disk └─sda1 8:1 0 90G 0 part ├─ubuntu--vg-root 252:0 0 89G 0 lvm / └─ubuntu--vg-swap_1 252:1 0 976M 0 lvm [SWAP] 
