Related content

• Charly's Column – Keepalived

  Columnist Charly likes to keep system-critical daemons on two or more servers. If one of the servers fails, the idea is that the service can be started on the other and will be available at the same IP address – a scenario that works with or without the Pacemaker heartbeat.

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• Charly's Column – httpstat

  Httpstat is a special stopwatch you can use to discover how long web servers take to serve up a static or dynamic HTML page. Visible performance lags indicate optimization potential for the server.

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• Charly's Birds

  Charly ran a first-generation Rasp Pi for years in the birdhouse in his garden, but the Rasp Pi eventually fell foul of marauding wasps. Now Charly has replaced it with an RPi3 featuring a NoIR cam and motion detection.

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• Charly's Column – The Fuck

  In the 25 years of Linux kernel history, a huge amount of code and many comments have accumulated. They can be explanatory, enlightening, funny, or even profane. Charly prefers to do things differently, so he types fuck in the shell.

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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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