LVM, or Logical Volume Manager, is a storage management technology available in Linux that allows users to manage disk space more flexibly and efficiently. It provides a layer of abstraction between physical storage devices (such as hard drives, SSDs, or partitions) and the file systems that reside on them. LVM allows for dynamic allocation, resizing, and management of storage volumes without the need to repartition disks, which can be particularly useful in environments where storage needs are expected to change over time.

Here's a brief overview of the key components and concepts of LVM :

Physical Volumes (PVs) : Physical volumes are the underlying storage devices or partitions that are initialized for use with LVM. These devices can be entire hard drives, partitions, or even RAID arrays. PVs are typically initialized using the pvcreate command.

Volume Groups (VGs) : Volume groups are logical containers that consist of one or more physical volumes. Volume groups aggregate the storage capacity of multiple physical volumes into a single pool of storage. VGs are created using the vgcreate command.
Logical Volumes (LVs) : Logical volumes are virtual storage volumes created within volume groups. LVs are analogous to traditional partitions but offer more flexibility in terms of resizing and management. Logical volumes can be formatted with file systems and mounted like regular partitions. They are created using the lvcreate command.

LVM Utilities : LVM provides a set of command-line utilities for managing storage resources. Common LVM commands include pvcreate (to initialize physical volumes), vgcreate (to create volume groups), lvcreate (to create logical volumes), lvresize (to resize logical volumes), and lvremove (to remove logical volumes).

Snapshotting : LVM supports snapshotting, allowing users to create point-in-time copies (snapshots) of logical volumes. Snapshots can be used for backup, data recovery, and testing purposes without affecting the original data.

Striping and Mirroring : LVM allows for advanced storage configurations such as striping (RAID 0) and mirroring (RAID 1) by combining multiple physical volumes into volume groups and configuring logical volumes with different RAID levels.