expand the root partition and then its filesystem

expand the root partition and then its filesystem

# first part, enlarge partition to 100%
sudo apt-get install -y -qq parted
ROOT_DISK=$(sudo lsblk -s|grep -A1 \/$|grep -v \/$|tr -d "└─"|cut -d\  -f 1)
PART_NUM=$(sudo parted -l $ROOT_DISK|grep ext4|sed "s/^[ \t]*//"|cut -d\  -f 1)
sudo parted -s /dev/$ROOT_DISK unit % resizepart $PART_NUM 100% || sudo parted /dev/$ROOT_DISK unit % resizepart $PART_NUM Yes 100%
touch /forcefsck
sudo reboot


# second part, enlarge inside filesystem
ROOT_PART=$(sudo mount | sed -n 's|^/dev/\(.*\) on / .*|\1|p')
#sudo e2fsck -f /dev/$ROOT_PART
sudo resize2fs /dev/$ROOT_PART
sudo reboot