Re: Query - Regarding strange behaviour.

From: linux-os (linux-os_at_analogic.com)
Date: 02/03/05

  • Next message: Pankaj Agarwal: "Re: Query - Regarding strange behaviour." 
    Date:	Thu, 3 Feb 2005 10:35:22 -0500 (EST)
To: Pankaj Agarwal <pankaj@toughguy.net>

    On Thu, 3 Feb 2005, Pankaj Agarwal wrote:

    > Hi,
    >
    > In my system there's a strange behaviour.... its not allowing me to create
    > any file in /usr/bin even as root. Its chmod is set to 755. Its even not
    > allowing me to change the chmod value of /usr/bin. The strangest part which i
    > felt is ...its shows the owner and group as root when i issue command "ls -ld
    > /usr/bin" and not allowing root to create any file or directory under
    > /usr/bin and not even allowing to change the chmod value. The error is access
    > permission denied... I can change the chmod value of /usr and other
    > directories under /usr/...but not of bin....
    >
    > I need your help/support. kindly let me know what all can i try to resolve
    > this problem.
    >
    > Thanks and Regards,
    >
    > Pankaj Agarwal

    See if your file-system has gotten hurt. Boot with init=/bin/bash
    and execute `/sbin/fsck -f /` to force a check of the root file-system.

    The next check is to see if you can fix the protections when
    you are the only one accessing the file-system:

    # mount -n -o remount / # re-mount root r/w
    # cd /usr
    # chmod 755 bin
    # ls -la # See if it worked
    # unmount /

    The next check is to replace the /usr/bin directory. Since `mv`
    and `mkdir` are in /bin, the following should work.

    # mount -n -o remount / # re-mount root r/w
    # cd /usr
    # mv bin foo # Rename 'strange' directory
    # mkdir bin # Make a new one
    # cd foo # Change to original
    # mv * ../bin # Rename all contents to new
    # cd ..
    # rmdir foo # Remove bad directory
    # chmod 755 bin # Fix protection
    # umount /

    After you have fixed things, you don't have to re-boot.
    Just execute:

    # exec /sbin/init auto

    Cheers,
    *** Johnson
    Penguin : Linux version 2.6.10 on an i686 machine (5537.79 BogoMips).
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  • Next message: Pankaj Agarwal: "Re: Query - Regarding strange behaviour."