Ubuntu – How to get into recovery mode on ubuntu 14.04 if the option not showing

bootgrub2kernelrecovery-modesudo

I just boot up my laptop then run the sudo apt-get update command, but there's an error says:

[username] is not in the sudoers file. This incident will be reported.

so I search the google for solution and it told me to go to the recovery mode on boot menu.

After I got there,the recovery mode option didn't exist. I searched again for another way, then I found some source says change the kernel option with single on linux line on boot menu. Well, I got problem while deleting the kernel option, which one is it?

If the code is:

Linux  /vmlinuz-3.13.0-44-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash $vt_handoff  

which part should I delete?

Anyway, I'm using the ubuntu 14.04; the grub version is 2.2 beta I believe.

Best Answer

  • If recovery mode option does not show up in boot menu, highlight boot option ubuntu in grub and hit E on your keyboard.

    On the next screen, replace the line

    Linux /vmlinuz-3.13.0-44-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash $vt_handoff
    

    with

    Linux /vmlinuz-3.13.0-44-generic root=/dev/mapper/ubuntu--vg-root ro recovery nomodeset
    

    Then hit F10 to enter recovery mode.