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Messed up fstab. Now file system is read-only and cannot repair fstab because of it.

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    #1

    Messed up fstab. Now file system is read-only and cannot repair fstab because of it.

    I did a wrong manipulation with the fstab file.

    It has a wrong UUID for the / mount point. The fstab file with the right UUID is in fstab.bkp.

    Now at startup, the file system is mounted read-only. So I cannot rename or edit fstab anymore.

    Is there a way to get out of this other than a clean install ? Some mount/remount with --fstab /etc/fstab.bkp ?
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    #2
    You'll need to utilize chroot. See https://help.ubuntu.com/community/LiveCdRecovery for how this is done. Don't worry that the link doesn't address "your issue"; using chroot allows you to mount the installed OS without booting the installed OS. Then you can work with the mounted partitions/data.
    Using Kubuntu Linux since March 23, 2007
    "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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      #3
      Originally posted by Erwin Smout View Post
      I did a wrong manipulation with the fstab file.

      It has a wrong UUID for the / mount point. The fstab file with the right UUID is in fstab.bkp.

      Now at startup, the file system is mounted read-only. So I cannot rename or edit fstab anymore.

      Is there a way to get out of this other than a clean install ? Some mount/remount with --fstab /etc/fstab.bkp ?
      just fire up a live cd/usb mount the partition it's on and edit away.

      VINNY
      i7 4core HT 8MB L3 2.9GHz
      16GB RAM
      Nvidia GTX 860M 4GB RAM 1152 cuda cores
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        #4
        Originally posted by vinnywright View Post
        just fire up a live cd/usb mount the partition it's on and edit away.
        Yup. Snowhog mentioned chroot which caused me to do a bit of a doubletake; but I do think we're all talking about doing the same thing
        we see things not as they are, but as we are.
        -- anais nin
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          #5
          Originally posted by wizard10000 View Post
          Yup. Snowhog mentioned chroot which caused me to do a bit of a doubletake; but I do think we're all talking about doing the same thing
          yes I think we are as well ,,,,,,,but we do not need a chroot just to edit the /etc/fstab file ,,,,,,,,,to do things like use "passwd" ,,,then yes a chroot is necessary.

          VINNY
          i7 4core HT 8MB L3 2.9GHz
          16GB RAM
          Nvidia GTX 860M 4GB RAM 1152 cuda cores
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            #6
            My how-to does some of this stuff (mount and edit key files, without chroot, etc.):

            Using Your Live Kubuntu DVD/USB to Fix Things
            https://www.kubuntuforums.net/showth...l=1#post379485
            An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles Bukowski
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              #7
              Thanks to all.

              In this case, mount -o remount,rw --fstab=/etc/fstab.bkp / got the job done after all.

              I'll try and remember about chroot.
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