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March 2, 2022 – 2:00 pm

Books have been written on the subject of awk and sed. Here’s a small sample of commands I put together over the years that are useful for everyday system administration tasks. Most of these tasks …

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Home » Archive by Month

Article Archive for April 2014

Searching Log Files

April 18, 2014 – 4:40 pm
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This is a quick example of finding the first and last occurrence of an event in the log file. This can be useful for determining the service outage window and for general troubleshooting. In the example below I am looking at the PostFix maillog file, trying to figure out the duration of the problem I’ve been having with one of the mail relay servers.

Looking for Recently Changed Files

April 3, 2014 – 2:55 am
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Locating most recently-modified files in the current directory is easy: ls -alt | head. However, searching a directory structure for recent changes may prove a little more challenging. The most common approach is to use …