title: Permission denied running my own program on Linux?
body: <p>I have Ubuntu 9.4. I've built the program, some basic OpenGL. The program just makes a rotating square. Then run it and:</p>
  
  <pre><code>sh: /blabla permission denied.
  </code></pre>
  
  <p>And an empty <code>main</code> doesn't work:</p>
  
  <pre><code>int main()
  {
      return 0;
  }
  </code></pre>
  
  <p>How can I make that disappear? </p>