title: cvs command on Ubuntu 11.10 seems broken?
body: <p>I have a clean install of Ubuntu 11.10 on my laptop.  I installed CVS with the command "<code>sudo apt-get install cvs</code>".  I have never had any trouble with the CVS command before, but in this case, I get this:</p>
  
  <pre><code>$ cvs
  cvs checkout: No CVSROOT specified!  Please use the `-d' option
  cvs [checkout aborted]: or set the CVSROOT environment variable.
  </code></pre>
  
  <p>The real puzzle to me is why it is assuming the "checkout" command.  That doesn't happen in other installations, where it just gives a usage message.  But, OK, there is no CVSROOT defined, so if I define one, say like this: </p>
  
  <pre><code>$ export CVSROOT=:pserver:me@abc.com:/cvsroot
  </code></pre>
  
  <p>I then get another very strange message, which again indicates that it is assuming "checkout":</p>
  
  <pre><code>$ cvs
  co: invalid option -- 'z'
  Usage:
    cvs checkout [-ANPRcflnps] [-r rev] [-D date] [-d dir]
    [-j rev1] [-j rev2] [-k kopt] modules...
  </code></pre>
  
  <p>This isn't just with the plain "cvs" command, by the way - <code>cvs login</code>, <code>cvs checkout</code>, <code>cvs update</code> and <code>cvs someGobbledegook</code> all give the same result.</p>
  
  <p>Any ideas what to try next?</p>