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After upgrading from Ubuntu 9.04 to 9.10 i am getting this message on boot up:

Mount of File System Failed. A maintenance shell will now be started. CONTROL-D will terminate this shell and retry. myusername@root:~$

After searching in google,i found out that i have to run the command fsck on the OS partition from ubuntu Live CD..

Here are my questions:

1) I dont know in which partition my ubuntu OS is installed..(Those are not user-friendly drive names to remember right :)) -- Is there any command to know in which partition my ubuntu os is installed? 2) Can i do this from Ubuntu 10.04 live CD?

Thanks in Advance


First, when i booted the live CD(10.04) and opened the file system, I dont see the UUID in the title.. And one more thing that /etc/fstab file has just three lines : 1) aufs /aufs rw 0 0 2) tmpfs /tmp nosuid,nodev 0 0 3) /dev/sda7 swap swap defaults 0 0 I dont know what to do..can u help me

Here are the screen shots:

alt textalt text

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Actually it's more likely that one of your filesystems has changed its address somehow. Boot a live CD (9.10 or above, 10.04 is fine), and report the output of sudo fdisk -l. Also report the contents of /etc/fstab (you'll probably have to change a line in that file). – Gilles Jan 9 '11 at 15:56

I think Gilles is right... in that case you just need to remap your disks with their new UUIDs.

  • boot up your live CD
  • open Nautilus and check which partition has similar folders to the picture below

alt text

You can see the partitions UUID in the title, if you wanna know what device this is...

  • press Ctrl+Alt+T to open Terminal and enter df -h

alt text

then find the device with same UUID...

  • now enter sudo -H gedit /media/<your UUID>/etc/fstab

alt text

replace your old UUID with your new one, make sure that you are replacing the right line in fstab. You can do this by checking if there is only / after the UUID.

You can same for your home as well, the only difference is, that you have to find your home directory and make sure that you are replacing the line with /home.

good luck!

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Can u explain this replace your new UUID with your old one, I dont remember the old one. – javanoob Jan 10 '11 at 4:59
haha I wrote it wrong :D it should be "replace your old UUID with your new one". Have corrected the text :P – danizmax Jan 10 '11 at 7:17
did the guide help? – danizmax Jan 10 '11 at 20:34
danizmax, I edited the question..can you look at the screen shots..I follwed what u said,But it is not working – javanoob Jan 13 '11 at 13:26
You are opening the wrong fstab file. Because you are booting the live CD, you opened the one from the CD. You see, when you boot Live CD the root (/) is not on your disk but on CD. So You must open the one from the disk instead. In the last screenshot, you can see: sudo gedit /media/<here-comes-your-UUID>/etc/fstab. Check my screenshots carefully again and you'll get it :P – danizmax Jan 13 '11 at 18:20
up vote 0 down vote accepted

The best solution I found is to run the fsck command and then it asked for confirmation pressed Y and then Ctrl+D..

Thats all. My system is working.

I found this solution here:

danizmax, the /etc/fstab file has the same UUID as the filesystem. I dont know why it failed.

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