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HOW TO : Query varnishlogs for requests with 404 responses

varnishlog, one of the tools provided with varnish cache, uses VSL Query Expressions (https://www.varnish-cache.org/docs/trunk/reference/vsl-query.html) to provide some powerful insights into the requests and responses. Here is...

01 Feb 2016

HOW TO : Enable wildcard domains in Squid

We were trying to modify some ACL (access control lists) in squid to allow traffic to certain websites. Instead of adding each individual hostnames in a...

15 Dec 2015

HOW TO : pipe results between commands when using sudo

Let’s say you are running a command as sudo and need to pass the output to a different command using pipe, you would run sudo command1...

12 Dec 2015

HOW TO : Capture network traffic on a Solaris server

If you don’t have tcpdump installed on your solaris server, you can use the “snoop” system command to capture network traffic. Here is the command line...

23 Nov 2015 1 min read

HOW TO : Get HDD performance stats in Linux

quick note for self hdparm -tT /dev/sdx sdx : actual device you want to test

26 Aug 2015

HOW TO : Use awk to print values larger than certain number

Quick how to on using awk to filter results if a certain value (column) is larger than a set value. For example, if you have a...

24 Aug 2015
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