Linux

Finding the local IP address with ifconfig and sed

Submitted by Paul Colby on 10 February 2009 - 5:54pm

There are many ways to determine local IP addresses on Linux platforms. They almost always involve piping ifconfig into a number of grep, awk, cat, and/or tr commands.

Well, my new favorite approach is to pipe ifconfig into a single sed command :)

ifconfig | sed -n -e 's/:127\.0\.0\.1 //g' -e 's/ *inet addr:\([0-9.]\+\).*/\1/gp'

Neat, huh?! :)

Calculating CPU Usage from /proc/stat

Submitted by Paul Colby on 23 October 2008 - 6:25pm

I recently came across a number of forum topics asking how to calculate CPU usage from /proc/stat, which raised a very slight sense of challenge within me (was just in "the mood" to do some BASH scripting)... so, here's an example showing how to calculate CPU usage with a simple BASH script.

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