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Linux – Reduce filesystem size
On Linux you can reduce the size of a filesystem using the command line.
Firstly you check the filesystem:
# fsck -f <logvolname>
Then you resize the filesystem:
# resize2fs <logvolname> <size>
You then reduce the log volume size:
# lvreduce <logvolname> <size>
Finally you mount the log volume:
# mount <logvolname>
Linux – Increase Filesystem
You can increase the size of a filesystem on Linux boxes whilst not having to unmount them, therefore doing the increase whilst they are online.
Linux / OEL
On a redhat or OEL system you can use the following:
# df -h
/home/krobbe > df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00 2.0G 204M 1.7G 11% /
....etc
# lvextend --size +1G /dev/VolGroup00/LogVol24
then either:
# ext2online /dev/VolGroup00/LogVol24
or:
# resize2fs /dev/VolGroup00/LogVol24