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Please post any question that you feel is of worth and the reason why. Try not to promote your own questions or answers for publicity sake. We are looking for questions that are of similar par to those selected in the Super User Contest. If you like a posted question then vote it up. Each week we are going to try to post about the question and it's contents.

2 Answers 2


What's different between Ctrl+Z and Ctrl+C in Unix command line?

Mark has once again managed to get massive rep for a great explanation of a pair of 'simple' Linux commands.

Control+Z is used for suspending a process by sending it the signal SIGSTOP, which cannot be intercepted by the program. While Control+C is used to kill a process with the signal SIGINT, and can be intercepted by a program so it can clean its self up before exiting, or not exit at all.

  • I know the answer is mine (but that's only why I remembered it), but why stop with explaining the difference in *nix when they're also slightly different in Windows -> superuser.com/q/214239/39366
    – DMA57361
    Commented Apr 4, 2011 at 13:23
  • Nobody's going to stop your from writing it @DMA ;-)
    – Ivo Flipse
    Commented Apr 4, 2011 at 13:24
  • Ha, I stepped right in to that one, didn't I... I don't mind taking this up if it is the selected post (it's about time I wrote something for the blog, after all), but only if I can add the CSS that makes <kbd> items into pretty looking buttons to the blog's style sheet, so I can use them in my post. :P (Joking aside, if I do write this post I would genuinely like to do that; answering on SU has made me mildly fond of the <kbd> keys...)
    – DMA57361
    Commented Apr 4, 2011 at 14:16
  • You have my permission to add the awesome <kbd> keys to the CSS @DMA if you write the blog post :P
    – Ivo Flipse
    Commented Apr 4, 2011 at 15:23

Speed comparison between USB 2.0, USB 3.0 and SATA and Firewire…

Which is fast, faster, fastest? I would appreciate a slowest to fastest list including USB 2.0, USB 3.0, FireWire 400, FireWire 800 and eSata.

  • Are you planning on testing these yourself? ;-)
    – Ivo Flipse
    Commented Apr 4, 2011 at 13:03
  • 3
    @IvoFlipse I was thinking this is one of the tests for the SU Super PC. Commented Apr 4, 2011 at 13:55

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