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• Charly's Column

  On vacation we may be happy just to check the position of the sun,but computers need a more accurate measure of time. Luckily, there are atomic clocks that can receive time signals by radio and off the Internet.

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• Charly's Column

  Webalizer is a tool for analyzing web server logfiles. A new patch lets admins see what isn’t there.

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• Charly's Column

  The principle behind Rsnapshot is nothing new: use Rsync and SSH to back up files to another computer. What sets Rsnapshot apart is its simple setup and its rich collection of features.

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• Charly's Column

  Without Network Address Translation (NAT) on many LANs, the IPv4 Internet address space would have been exhausted years ago. Still, it’s probably a good idea to check what comes through your NAT connections.

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• Charly's Column

  If protocols were human beings, NNTP would be a kind and slightly confused person that always believes the best of other people – even if they drop trash in the mailbox. Postfilter gives NNTP a watchdog.

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