"Managing disk space used to be a royal pain for admins and
users. Running out of disk space often meant reinstalling Linux or
spending a few hours with tools like Parted to resize partitions.
However, using the Logical Volume Manager (LVM) tools, you can
grow, shrink, and manage disk space with very little hassle.
"Before jumping into the details of setting up LVM, you need to
familiarize yourself with LVM terminology. LVM refers to a typical
partition as a Physical Volume (PV). A Volume Group (VG) comprises
one or more physical volumes. Each volume group must be divided
into Logical Volumes (LV)..."