[ubuntu-in] Unable to open the synaptic package manager & can't run sudo command

[Mehul Ved]

On Tue, Dec 15, 2009 at 7:06 AM, tabankg <khabor08 at gmail.com> wrote:
> Friends,
>    I have upgraded my Ubuntu-9.04(JAUNTY JACKALOPE) OS to Ubuntu-9.10(KARMIC
> KOALA).
> Due to some anomaly,I am unable to open the "Synaptic Package Manager".
> Also,the "sudo" command is not working as I boot as a normal user.Though the
> root password and all administrative commands are working.
> When i run the sudo command as such:
> kgnile09sg at ubuntu09:~$ sudo apt-get update
> sudo: must be setuid root

A little homework would have helped you.
http://ubuntuforums.org/showthread.php?t=219767