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• Charly's Column: Di

  The more frequently a command is used, the fewer letters it should have, so the use of twokey commands like ls, mv, and df is second nature. We look at a previously little-known representative of this club, di.

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• Charly's Column

  Too many cooks spoil the broth, they say, but it could just as easily be an ingredient that isn’t part of the recipe. If you can’t reduce the number of cooks, you have to take other steps to make your broth more edible.

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• The sys admin's daily grind: Users and groups

  This time Charly investigates the three most frequently asked questions about user groups.

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• Charly's Column

  If you do not receive a response to a ping, or if the response is seriously delayed, you might like to take this as a warning. But who wants to ping all day? You need a ping-based monitoring utility like Smokeping.

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• Charly's Column: Nmon

  Nmon monitors system information. You can use the Nmon’s capture mode to output data to a file, then extract the values you need with a script.

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