title: Niceness and priority processes on Linux system
body: <p>I am looking for a way to modify a process' priority through command line.
  I found the builtin (bash) <code>nice</code> and the command <code>renice</code> which allow to modify the niceness of the process, but not the actual priority which is calculated by the kernel.</p>
  
  <p>Is there a command which allows to set the priority?
  (Or am I confused between niceness and priority?)</p>