title: A running bash script is hung somewhere. Can I find out what line it is on?
body: <p>E.g. does the bash debugger support attaching to existing processes and examining the current state?</p>
  
  <p>Or can I easily find out by looking at the bash process entries in /proc?  Is there a convenient tool to give line numbers in active files?</p>
  
  <p>I don't want to have to kill and restart the process.</p>
  
  <p>This is on Linux - Ubuntu 10.04.</p>