Expand LVM Volume

Expanding the Logical Volume

1. Check Available Space: Before expanding, check how much free space is available in the volume group.
   

   1. vgdisplay
      
2. Resize the Logical Volume: To extend the logical volume, use the following command. Replace <size> with the amount you want to add (e.g., 10G for 10 GB):
   1. sudo lvextend -L +<size> /dev/mapper/ubuntu--vg-ubuntu--lv
      
3. Resize the Filesystem: After resizing the logical volume, you need to resize the filesystem to use the new space:
   1. For ext4 filesystem:
      1. sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
         
   2. For XFS filesystem:
      1. sudo xfs_growfs /dev/mapper/ubuntu--vg-ubuntu--lv

Shrinking the Logical Volume

1. Check Filesystem Size: Before shrinking, ensure the filesystem is smaller than the logical volume you want to resize it to. You might need to reduce the filesystem size first.
   1. For ext4 filesystem:
      1. sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv <new_size>
   2. For example, to shrink to 20G:
      1. sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv 20G
         
2. Reduce the Logical Volume: Now you can safely reduce the logical volume:
   1. sudo lvreduce -L <new_size> /dev/mapper/ubuntu--vg-ubuntu--lv
      
3. Resize the Filesystem Again (if necessary): If you haven’t already resized the filesystem in the first step, you can do it now.