I want to run the script edit content of fstab file and run at boot time, i want to delete these text "errors = remount-ro" where UUID, instead of "ro" and add some line to the bottom , ex: "tmpfs / home tmpfs defaults, siz = xyz 0 0 ". The reason that I created iso file setup ubuntu running on ramdisk by remastersys, however it is not saved fstab file, so I want to write script to edit it, but i dont's master script , so can someone help me?