Detecting whether hyperthreading is enabled

We’ve recently had requests for our internal inventory to flag which systems have hyperthreading enabled and which don’t. This brought up the question of what’s the simplest and most universal way to detect if a given Linux server has hyperthreading enabled. The expected google searches turned up a lot of discussion but not a lot of definitive answers. With this post I’d like to offer three different tests I have found, and also open for discussion how reliable and universal these tests are, and if there are perhaps better alternatives.
Continue reading

Help Bellevue College develop a SA-related degree program

From email that was just sent to the Seattle Area System Administrators Guild: Hello SASAG members, Bellevue College is planning to add an applied bachelor’s degree in Information Systems & Technology to our current certificates and two-year programs in IT. One of the planned foci of this degree will be systems and network administration. We…

Continue reading

Philosophy of System Administration

At a job interview last year, I was asked “What is your philosophy of system administration?” It’s a good question and one I hadn’t been asked before. Here’s Digital Elf on his philosophy of system administration: https://digitalelf.net/2011/09/philosophy-of-system-administration/ What’s yours?

Don’t Mess With Grace Hopper

Rear Admiral Grace Hopper was a serious force to be reckoned with. After retiring she was also a particularly good lecturer and had effective ways of getting across points those outside the industry might not be thinking about. One of them was how she would regularly hand out 30cm pieces of wire at her talks and then later on point out that is roughly how far light travels in 1 nanosecond. We in the computing industries actually owe a lot to her and too seldom think about her era of computing history.

I was amused to see SMBC (Saturday Morning Breakfast Cereal, a web-comic that is often extremely NSFW; it is lewd and crude but in a way that points out sexism and other negative behaviours) make Grace Hopper the focus of today’s cartoon:

Panel 1 of SMBC comic featuring Grace Hopper

The webcomic may not be to your taste generally, but I hope you enjoy this one.
Continue reading

Google Apps Directory Sync (GADS) and OpenLdap

I have been working with Google for 3 weeks trying to get GADS to sync our passwords from OpenLdap to Google Apps. GADS kept saying in all the logs that the password was sync’ed correctly, but no luck. I worked with Google Support and we tried everything (almost) including generating lots of debug logs that said yep the passwords sync’ed ok, but they were not sync’ed. I searched for answers on the web – no luck.
Continue reading