title: Disable history in Linux
body: <p>To disable a history in Linux environment I've executed the following commands:</p>
  
  <pre><code>export HISTFILESIZE=0
  export HISTSIZE=0
  unset HISTFILE
  </code></pre>
  
  <p>Is such command combination enough or I have to also execute <code>history -c</code> or something else?</p>
  
  <p>Will this keep history disabled even when I reboot a server or such commands need to be executed after reboot again and again?</p>