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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 January 2017

Monitoring DNS Queries

January 27, 2017 – 7:20 am
shell_0005

Recently I’ve been decommissioning old DNS servers and those things are notoriously hard to get rid of. The problem was that the IP addresses could not be preserved. I needed to track down every incoming …

DHCP Server Log Analysis

January 24, 2017 – 5:51 pm
servers_003

A quick script to go through your DHCP server log and get a summary of MAC addresses and associated DHCP requests. The script will attempt to download the IEEE OUI list for identifying the manufacturers …

Google Search Tips

January 15, 2017 – 10:17 pm
oskjdhhd

Google has some advanced search features that few people use, which is a shame. Here are some of them, by Karl Hindle. I am sure there are a few more, but these are the more …