We can reduce a Logical Volume with “lvreduce” command. The simple syntax is “lvreduce -L -size vgname/lvname“. You can also resize the filesystem, but you need to add -r parameter “lvreduce -L -size vgname/lvname -r“. In our example we will reduce LV called “GeekVol01” on a VG called “GeekPeek” from 5GB to 3GB (-2GB in size). We should deactivate our LV first with “lvchange” and later reactivate it: