@Kishore Kumar Are you using volume groups? if yes,First of all you need to see if you have any available pe's in your volume group (in this case vg00). Check the output of # vgdisplay vg00 Then, assuming you have some Physical Extents free, you can extend the /usr volume, # lvextend -L +<x-amount>G /dev/vg00/usr after that you need to resize your filesystem to reflect the new size of this "partition": # resize2fs /dev/vg00/usr assuming it is ext3 or # resize4fs /dev/vg00/us if your partition filesystem is ext4 (check in /etc/fstab file if necessary) If you have no PE's available, you could consider either to shrink another volume in the same group (like home in this case), or add another PV. Regardless, note that the fact you have a partition that's 100GB in size does not mean you have access to 100GB. Since it is a physical volume used for LVM it only means you have 100GB worth of Physical Extents
... View more
