Quickly Expand Linux Volume

 There are various complicated ways to expand a Linux volume. Here is an easy one using parted.

First, use command lsblk to show disk volume info, for example:

$ lsblk
NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
fd0           2:0    1    4K  0 disk 
sda           8:0    0   40G  0 disk 
├─sda1        8:1    0    1G  0 part /boot
└─sda2        8:2    0   19G  0 part 
  ├─cl-root 253:0    0   17G  0 lvm  /
  └─cl-swap 253:1    0    2G  0 lvm  [SWAP]

To expand cl-root volume, enter command:

parted ---pretend-input-tty /dev/sda resizepart 2 100%;
partx -u /dev/sda; pvresize /dev/sda2;
lvextend -r /dev/cl/root /dev/sda2

If the command does not work, just update parted by yum update parted. This works in CentOS 7.