title: What is the meaning of "export" in Bash?
body: <p>When I customize my environment, I add <code>PATH=$PATH:$My-own-Path</code> in file <em>.bash_profile</em>.</p>
  <p>The tutorials tell me I should use this one: <code>export PATH=$PATH:$My-own-Path</code></p>
  <p>So, what is the difference?</p>