P ossible result would be hang your booting at a black screen. F ix would be restoring the fstab file. Unfortuanatly if you don’t have a back up file have to recreate the file manually. Y ou should be able to go to recovery mode by pressing esc button till boot option menu appears. Then select advance options and then select recovery mode. T hen should see a white ui window. Select Update g rub bootloader to to get read write access to file system. Then select drop to root shell prompt. N ow sudo blkid file get partition info sudo blkid /dev/sda1: UUID="78985254-78ae-45b3-923d-804c7d56a7dc" TYPE="ext4" PARTUUID="ab55e511-01" /dev/sda2: UUID="a30e14b5-0203-4ef3-a135-2dad9c26c309" TYPE="swap" PARTUUID="ab55e511-02" /dev/sda3: UUID="377ce2fa-29c3-46d2-87da-88ff55502d66" TYPE="ext4" PARTUUID="ab55e511-03" Since ...