Bash Check Filesystem Type

filesystemcheck.sh

#!/bin/bash

if [ -z "$1" ];then
  echo "0 Arguments given. Please pass in a disk path" 
  echo ""
fi

fstype=`df -T | grep $1 | awk '{print $2}'`

if [[ $fstype == "ext4" ]];then
  echo "do the thing"
else
  echo "don't do the thing"
fi