Have you ever encountered your laptop cannot boot into ubuntu after power failure.When boot up ubuntu,system start checking and repairing and this always do not work.Try following and it may help!

First,boot up and let ubuntu auto repairing the system.If it doesn’t work,there will be two choices:press Ctrl+D to check and repair again or input supervisor password to access to shell.

input your password and get into shell to type this command:


it will start repairing system and you just need to typr “y” or press Enter when it ask you something for continue.