title: octave in ubuntu: 'rm' undefined near line 1 column 1
body: <p>I am running octave in ubuntu. I got the following problem while trying to delete a file:</p>
  
  <pre><code>&gt;&gt; ls
  cos1.dat  cos.dat  datFile.grc top_block.py
  &gt;&gt; rm cos1.dat
  error: 'rm' undefined near line 1 column 1
  </code></pre>
  
  <p>However, everything is OK in windows</p>