lvm

Introduction

This cheat sheet provides a quick reference for some common LVM (Logical Volume Manager) commands and concepts. LVM is a command-line utility used for managing logical volumes and volume groups on Linux systems.

`LVM` Concepts

Physical Volumes (PV)

Physical volumes are physical storage devices (e.g., hard drives or partitions) used to create logical volumes.

Display a list of physical volumes:
```
pvdisplay
```
Create a physical volume:
```
pvcreate /dev/sdX
```

Volume Groups (VG)

Volume groups are logical containers that can consist of one or more physical volumes.

Display a list of volume groups:
```
vgdisplay
```
Create a volume group:
```
vgcreate myvg /dev/sdX
```

Logical Volumes (LV)

Logical volumes are partitions created within volume groups.

Display a list of logical volumes:
```
lvdisplay
```
Create a logical volume:
```
lvcreate -L 10G -n mylv myvg
```

Resize Operations

You can resize physical volumes, volume groups, and logical volumes.

Resize a physical volume:
```
pvresize /dev/sdX
```
Resize a volume group:
```
vgextend myvg /dev/sdY
```
Resize a logical volume:
```
lvresize -L +2G /dev/myvg/mylv
```

Mounting and Filesystems

After creating a logical volume, you can format it with a filesystem and mount it.

Format a logical volume with ext4:
```
mkfs.ext4 /dev/myvg/mylv
```
Mount a logical volume:
```
mount /dev/myvg/mylv /mnt/mylv
```

`LVM` Command-Line

Display a list of physical volumes:
```
pvdisplay
```
Create a physical volume:
```
pvcreate /dev/sdX
```
Display a list of volume groups:
```
vgdisplay
```
Create a volume group:
```
vgcreate myvg /dev/sdX
```
Display a list of logical volumes:
```
lvdisplay
```
Create a logical volume:
```
lvcreate -L 10G -n mylv myvg
```
Resize a physical volume:
```
pvresize /dev/sdX
```
Resize a volume group:
```
vgextend myvg /dev/sdY
```
Resize a logical volume:
```
lvresize -L +2G /dev/myvg/mylv
```
Format a logical volume with ext4:
```
mkfs.ext4 /dev/myvg/mylv
```
Mount a logical volume:
```
mount /dev/myvg/mylv /mnt/mylv
```

Conclusion

This cheat sheet covers some common LVM (Logical Volume Manager) commands and concepts. LVM is a powerful tool for managing logical volumes and volume groups on Linux systems, making it useful for storage management and partitioning tasks; refer to the official LVM documentation for more in-depth information and advanced usage.

lvm

Introduction​

LVM Concepts​

Physical Volumes (PV)​

Volume Groups (VG)​

Logical Volumes (LV)​

Resize Operations​

Mounting and Filesystems​

LVM Command-Line​

Conclusion​