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How to make existing LVM Logical Volume smaller

Sometime you will need to make Logical Volume smaller because you require extra space somewhere. Follow following steps to achieve that:

We have 6.88 Gb Logical Volume. We need it to be 5 GB.

Boot into rescue mode using installation CD/DVD
# lvm vgscan
# lvm vgchange -ay 
# lvm lvs 
# e2fsck -f /dev/VolGroup00/LogVol00 
# resize2fs /dev/VolGroup00/LogVol00 5G 
# lvm lvreduce -L-1.88G /dev/VolGroup00/LogVol00

Done!

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