gistfile1.sh

#!/bin/bash

NEWDEV='/dev/vdb'

# Partition the new disk as LVM
echo -e "n\np\n1\n\n\nt\n8e\nw" | sudo fdisk $NEWDEV

# Initiate the disk
sudo pvcreate $NEWDEV\1

# Get the VG Name
VGNAME=$(sudo vgdisplay | grep 'VG Name' | awk {'print $3'})

# Extend the volume
sudo vgextend $VGNAME $NEWDEV\1

# Get the free size in VG
FREESIZE=$(sudo vgdisplay | grep 'Free  PE / Size' | awk {'print $7'})

# Get root partition
LVROOT=$(sudo lvdisplay | grep 'LV Name' | grep 'root' | awk {'print $3'})

# Expand the volume
sudo lvextend -L $FREESIZE\G $LVROOT

# Expand the file system
sudo sudo resize2fs $LVROOT