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I installed Ubuntu 14.04 on my Asus PC. (If it matters, the OS is installed on my SSD.) The attach image shows the error message when booting. Picture of error message 

Gave up waiting for root device. Common problems:
  — Boot args (cat /proc/cmdline)
    — Check rootdelay= (did the system wait long enough?)
    — Check root= (did the system wait for the right device?)
  — Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/aa91b9fe-eea9-4578-a707-ob9d585761e9 does not exist.   
Dropping to a shell! 

BusyBox v.1.21.1 (Ubuntu 1:1.21.1-1ubuntu1) built-in shell (ash)   
Enter 'help' for list of built-in commands.  

(initramfs)

I have found a temporary solution for start up or restart. After the error message is completely on the screen, I type blkid > blockdev > blkid > exit. I have no idea what "blkid" or "blockdev" are, but my PC finishes booting. Temp. solution not from me: https://askubuntu.com/a/268420/530393

I recently have found a potential permanent solution: https://askubuntu.com/a/742130/530393, but I don't fully understand the steps. Could I do this from the Terminal?

Community
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Donald Donney Clark
  • 21

1 Answers1

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Yes, the steps in the answer can be done from a terminal.

The first thing you need to do is determine what partition you installed Ubuntu on. This can be done by using

sudo fdisk -l

It will probably be /dev/sda1 but look at the descriptions to the right when it lists the devices. Next, you need to unmount the device. This is done with

sudo umount name_of_device

If it complains that the device is busy, try

sudo umount -f name_of_device

Then run the fsck command in the answer.

Andrew
  • 797