I want to check whether my root drive requires a defragmentation. If requried I am planning to do this
sudo e4defrag -c /dev/<my partition> I followed this method to analyze my disk.
sudo touch /forcefsck sudo tune2fs -c 1 /dev/<my partition>
Then I rebooted my system but its showing nothing on my reboot and directly goes to the login page. How to analyze and defrag a drive in ubuntu 16.04?