Increase LVM Partition

First you need to check that there is free space available to use.

vgdisplay

To view the logical volumes use the following command

lvdisplay

Expand volume

lvextend -L+20G /dev/centos/root

-L+20G –> extesion by 20GB
-L+100%FREE –> use all free space

Resize the file system

xfs_growfs /dev/centos_lvm/root

For ext3/ext4-Partitions you can alternatively use

resize2fs /dev/centos_lvm/root

Other useful commands

lsblk
df -h