$ curl cheat.sh/
 cheat.sheets:lvextend 
# lvextend
# Extend the size of a logical volume.

# Extend a logical volume by a specific size (e.g., 10GB)
lvextend -L +10G /dev/vg_name/lv_name

# Extend a logical volume to a specific size (e.g., 50GB)
lvextend -L 50G /dev/vg_name/lv_name

# Extend a logical volume using all the available space in the volume group
lvextend -l +100%FREE /dev/vg_name/lv_name

# Extend a logical volume on a specific physical volume
lvextend -L +5G /dev/vg_name/lv_name /dev/sdX

# Extend a logical volume and resize the filesystem on the fly (for ext2/ext3/ext4 file systems)
lvextend -r -L +10G /dev/vg_name/lv_name

# Extend a logical volume to use all the remaining unallocated space in the group and resize the filesystem
lvextend -r -l +100%FREE /dev/vg_name/lv_name

# Extend ext4 filesystem after changing a logical volume
# (takes volume path as parameter):
ext2resize /dev/vg0/mylv

# Extend btrfs filesystem after changing a logical volume
# (takes the mount point as parameter, not the volume path):
btrfs filesystem resize max /mylv

# Extend xfs filesystem after changing a logical volume
# (takes the mount point as parameter, not the volume path):
xfs_growfs /mylv

# Extend jfs filesystem after changing a logical volume
# (takes the mount point as parameter, not the volume path);
# Just remount:
mount -o remount,resize /home

 tldr:lvextend 
# lvextend
# Increase the size of a logical volume.
# See also: `lvm`.
# More information: <https://man7.org/linux/man-pages/man8/lvextend.8.html>.

# Increase a volume's size to 120 GB:
lvextend --size 120G logical_volume

# Increase a volume's size by 40 GB as well as the underlying filesystem:
lvextend --size +40G -r logical_volume

# Increase a volume's size to 100% of the free physical volume space:
lvextend --size 100%FREE logical_volume

$
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