In linux you can anytime break your system and it happens a lot and you have some problems. One of these most common problem is read-only mode in linux. Here is the solution if you are getting this problem. Step 1 : Know the name of your harddisk. First of all , you should know the name of your hard-disk. For that , you can use the command given below. fdisk -l You can also know the name by opening Gparted. Just open Gparted and on upper right corner , your harddisk name will be shown. Step 2 : Fix the error. Run the following command in order to fix your error. sudo fsck (name of harddrive) Then , just reboot your system and your problem will be solved. Hope, it will fix your system.