I’ve seen the inside of lots and lots of businesses over the past decade or so. Though the technology has changed somewhat dramatically in many areas of the data center, the general, high-level methodologies for building a sane environment can still be applied. While the implementation is typically done by system administrators, it also helps…
Month: January 2009
Throw out your Perl: One-line aggregation in awk
I ran into a student from a class I taught last summer. He’s a really sharp guy, and when I first met him, I was impressed with just how much Perl he could stuff into his brain’s cache. He would write what he called ‘one-liners’ in Perl that, in reality, took up 5-10 lines in…
Teaching a Course on Profiling and Debugging in Linux
Dear Lazyweb, So, I’ve been in Chicago for a week teaching a beginner and an intermediate course on using and administering Linux machines. This week, I’ll teach an intermediate and an advanced course on Linux, and the advanced course will cover profiling and debugging. The main tools I’m covering will be valgrind and oprofile, though…
Shell Scripting: Bash Arrays
I’m actually not a huge fan of shell scripting, in spite of the fact that I’ve been doing it for years, and am fairly adept at it. I guess because the shell wasn’t really intended to be used for programming per se, it has evolved into something that sorta kinda looks like a programming language…
Heading to Chicago
I’ll be landing in Chicago tonight, assuming all goes well. I’ll be there through Jan 23. If there are any Linux User Groups, LOPSA meetings, Python user groups, or anything else cool (a brewer’s club maybe?) then find me on twitter (bkjones), or shoot me an email (same name, at gmail). I’m teaching courses on…
Advanced Linux Course… In Chicago… In January!
You heard it right, folks. I’ll be in lovely downtown Chicago for two weeks. Actually, I’m teaching 4 classes, each one consisting of a week’s worth of half-day sessions. 1 beginner course, two intermediate courses, and an advanced course. I’ll also be returning in February to do an intermediate and advanced course. This was the…
The Bandwidth Delay Product
I’ve actually needed to perform this calculation in the past, but never knew it had a proper name! The value produced by this simple calculation will tell you how much of your network pipe you can actually fill at any given point in time. To figure this out, you need two values: the available bandwidth,…