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Expand Logical volume in Linux LVM

LVM makes it easy to resize volumes in Linux. This can be done without unmounting drives or requiring a restart.

First determine the free space of the group volume.

vgdisplay

Determine the path to the volume group and extend it using vgextend ubuntu-vg /dev/sda3 where ubuntu-vg is the group name and /dev/sda3 is a partition created using fdisk.

lvdisplay

Expand the logical volume into the group volume. You can specify a size (M for Megabytes, G for Gigabytes, T for Terabytes) …

lvextend -L+19G /dev/ubuntu-vg/ubuntu-lv

or you can expand the logical volume into the remaining free space.

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

You will get a success message similar to the screenshot below after the task is completed.

Resize the partition to use the newly expanded logical volume

resize2fs /dev/ubuntu-vg/ubuntu-lv