In this tutorial, we will show you how to extend an LVM disk on your Ubuntu 20.04 Server. Resizing disks is a common yet challenging task for system administrators, when servers are running out usable disk space or when the standard partitioning during installation does not fit their bespoke needs.
What is LVM?
LVM stands for Logical Volume Management. It is a system of managing logical volumes, or filesystems, that is much more advanced and flexible than the traditional method of partitioning a disk into one or more segments and formatting that partition with a filesystem (source: https://wiki.ubuntu.com/Lvm).
LVM consists of 3 main concepts: