The default screen capture tool in Mac OS X is pretty nifty, except that it doesn’t allow you to take screenshot of login screen. Here is how you can overcome the limitation.
The default screen capture tool in Linux (particularly Ubuntu) is really minimal. If you are someone who need to take screen capture on a regular basis, I am sure you will appreciate the many features built into HotShots. It is really a lightweight and useful screen capture tool for Linux.
It is easy to take a screenshot in Ubuntu, but what if you want the system to take a screenshot automatically at a regular interval, say every 5 seconds? Here is a quick way you can take screenshots in Ubuntu at regular interval.