What is LVM

LVM Diagram

TL:DR

LVM is a way to abstract physical volumes (Disks/ Hard Drives / SSDs) from the filesystems running on top.

The main commands are.

pvdisplay

pvcreate

pvmove

pvremove

vgdisplay

vgcreate

vgextend

vgreduce

lvdisplay

lvextend

lvreduce