LVM Cheatsheet #

LVM (Logical Volume Manager) allows for flexible disk management by creating logical volumes that can be resized dynamically.

Basic Commands #

Command/Option	Example	Description
`pvcreate`	`pvcreate /dev/sdX1`	Initialize a physical volume
`vgcreate`	`vgcreate my_vg /dev/sdX1`	Create a volume group
`lvcreate`	`lvcreate -n my_lv -L 10G my_vg`	Create a logical volume
`pvdisplay`	`pvdisplay`	Display information about physical volumes
`vgdisplay`	`vgdisplay`	Display information about volume groups
`lvdisplay`	`lvdisplay`	Display information about logical volumes

Volume Management #

Command/Option	Example	Description
`lvextend`	`lvextend -L +5G /dev/my_vg/my_lv`	Extend the size of a logical volume
`lvreduce`	`lvreduce -L -5G /dev/my_vg/my_lv`	Reduce the size of a logical volume
`lvremove`	`lvremove /dev/my_vg/my_lv`	Remove a logical volume
`vgremove`	`vgremove my_vg`	Remove a volume group
`pvremove`	`pvremove /dev/sdX1`	Remove a physical volume

Snapshot Management #

Command/Option	Example	Description
`lvcreate --snapshot`	`lvcreate --snapshot --name my_snapshot --size 1G /dev/my_vg/my_lv`	Create a snapshot of a logical volume
`lvremove`	`lvremove /dev/my_vg/my_snapshot`	Remove a logical volume snapshot

File System and Mounting #

Command/Option	Example	Description
`mkfs.ext4`	`mkfs.ext4 /dev/my_vg/my_lv`	Create a file system on a logical volume
`mount`	`mount /dev/my_vg/my_lv /mnt`	Mount a logical volume to a directory
`umount`	`umount /mnt`	Unmount a logical volume

Commands for Managing Physical Volumes #

Command/Option	Example	Description
`pvcreate`	`pvcreate /dev/sdX1`	Initialize a physical volume
`pvscan`	`pvscan`	Scan all disks for physical volumes
`pvs`	`pvs`	Display physical volume information

Commands for Managing Volume Groups #

Command/Option	Example	Description
`vgcreate`	`vgcreate my_vg /dev/sdX1`	Create a new volume group
`vgextend`	`vgextend my_vg /dev/sdX2`	Add a new physical volume to a volume group
`vgremove`	`vgremove my_vg`	Remove a volume group
`vgs`	`vgs`	Display volume group information

Commands for Managing Logical Volumes #

Command/Option	Example	Description
`lvcreate`	`lvcreate -n my_lv -L 10G my_vg`	Create a new logical volume
`lvextend`	`lvextend -L +5G /dev/my_vg/my_lv`	Extend the size of a logical volume
`lvreduce`	`lvreduce -L -5G /dev/my_vg/my_lv`	Reduce the size of a logical volume
`lvremove`	`lvremove /dev/my_vg/my_lv`	Remove a logical volume
`lvs`	`lvs`	Display logical volume information

This cheatsheet covers essential LVM commands and options to help you manage and maintain logical volumes, volume groups, and physical volumes effectively.