securing an Ubuntu box in a shared office?

[Eric Hanchrow]

    2. Install and run a package called Bastille-Linux.

Ironically, "aptitude install bastille" yields this warning:

    18:29:27 [root at debian ~]# aptitude install bastille
...
    Do you want to continue? [Y/n/?]
    WARNING: untrusted versions of the following packages will be installed!

    Untrusted packages could compromise your system's security.
    You should only proceed with the installation if you are certain that
    this is what you want to do.

-- 
... belief in the omniscient hacker is indistinguishable from
belief in a Supreme Being.  There is simply no argument one can
give that will dissuade a true believer, yet when the believer is
asked for a demonstration he is unable to produce one.
        -- Michael Shamos