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Thread: Executing a startup script as root?

  1. #1
    Join Date
    Sep 2009

    Executing a startup script as root?

    The main question:
    Can I make my script run as root at startup such that all commands (e.g mount, dd etc) may also run as root no matter if root , administrator, desktop user or an unprivileged user logs in?

    What does the script do?
    The script mounts a partition, looks for a file in that partition and finally on the basis of that file a decision of copying a partition to another partition is made. That copying is done via
    dd if=/dev/sda2 of=/dev/sda5
    When does the script run finely?
    Script runs smoothly when I run it from the terminal by
    sudo ./my_copying_script
    This command asks me for the password of currently logged in user. I enter the password and the script starts working.
    When does the script NOT run finely?
    I want to run the script at startup. I set it a startup program by using the Startup Applications utility of Ubuntu. Script ran at startup but exited at the dd command returing following error:
    dd: opening '/dev/sda2': Permission denied
    I then prefixed the dd with sudo as mentioned below
    sudo dd if=/dev/sda2 of=/dev/sda5
    but this returned following error:
    sudo: no tty present and no askpass program specified
    Last edited by usmanajmal; April 18th, 2010 at 05:26 PM.

  2. #2
    Join Date
    Jul 2006
    Los Angeles
    Ubuntu 10.10 Maverick Meerkat

    Re: Executing a startup script as root?

    You're using dd commands in an automated script? Is that really what you want?

    If yes, then I think you could have the script run with root permissions by putting it in a system dir, eg /usr/local/my-copying-script and giving it the right execute permissions.

    If you're running it as a user, and "sudo ./my-copying-script" works, that implies you have it in your home directory. Is that right?

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