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I've locked myself out of my Ubuntu box!

  • 11-07-2007 5:22pm
    #1
    aidan_walsh
    Closed Accounts Posts: 17,208 ✭✭✭✭


    From the "Its important to double check the documentation" department:

    I've been having a bit of fun resetting up my file server at home. But today I managed to pull the right doozie of them all, and I can't find a way around it.

    I have been trying to implement an init.d script I found to control Subversion. I made a few small modifications to the script so that I could run them from my own user account (dumb, I now know). Anyway, part of that meant adding my account to a new user group "subversion".

    usermod -Gsubversion aidan

    Now its time to do some editing. sudo emacs /blah/blah/etc

    "aidan is not in the sudoers file. This incident will be reported."

    Well, what I discover now is that, slightly contrary to what the original webpage had told me about -G (adds the user to a new group), it also erases the groups that the user is currently added to (for reasons that are beyond me at the minute...). And now I can't sudo to add a new user to sort the problem out?

    Anyone got any suggestions?


Comments

  • #2
    maxheadroom
    Registered Users, Registered Users 2 Posts: 1,569 ✭✭✭maxheadroom


    Boot off a live CD. Open a root terminal. Chroot into your ubuntu server. Edit the /etc/group or /etc/sudoers file


  • #3
    Illkillya
    Registered Users, Registered Users 2 Posts: 2,372 ✭✭✭Illkillya


    If you don't have a live CD, you can also get access by booting into single user mode (Google it)


  • #4
    aidan_walsh
    Closed Accounts Posts: 17,208 ✭✭✭✭aidan_walsh


    No, I have a LiveCD here. Cheers guys.


  • #5
    scojones
    Closed Accounts Posts: 7,230 ✭✭✭scojones


    maxheadroom wrote:
    Boot off a live CD. Open a root terminal. Chroot into your ubuntu server. Edit the /etc/group or /etc/sudoers file

    That should do it. If you don't know how to chroot your ubuntu install from the live cd just ask here. :)


  • #6
    aidan_walsh
    Closed Accounts Posts: 17,208 ✭✭✭✭aidan_walsh


    scojones wrote:
    That should do it. If you don't know how to chroot your ubuntu install from the live cd just ask here. :)
    Or in the Moderator forum ;)


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  • #7
    Explosive_Cornflake
    Registered Users, Registered Users 2 Posts: 2,127 ✭✭✭Explosive_Cornflake


    Fyi, the switch you want usermod -aG, to add yourself to a supplemental group.
    Suse use just G afiak, and gentoo is -aG. I got caught out by that before, but luckily i had a another shell open as root.


  • #8
    scojones
    Closed Accounts Posts: 7,230 ✭✭✭scojones


    aidan_walsh wrote:
    Or in the Moderator forum ;)

    I have to say that was gas. hehe. :)


  • #9
    SouperComputer
    Registered Users, Registered Users 2 Posts: 6,949 ✭✭✭SouperComputer


    always keep a copy of RIP handy!


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