The Crabby Admins are proud to feature Tom Limoncelli speaking at our meeting tomorrow, April 4, from 7-9pm. Tom will be presenting on "The Ganeti Open Source Virtualization Project (& Why a Time Management Guru Loves It)". For anybody in the Baltimore/DC area that may not have attended a LOPSA meeting in the past, I…
LOPSA needs your help. As you probably already know, LOPSA is an entirely volunteer driven organization. We (the board) can't do everything ourselves, so we are looking for volunteers in all sorts of areas. If you're interested, e-mail volunteers@lopsa.org.
Let's say you want to write a regex that will match any string that does NOT contain the string "hello world". Use: ^((?!hello world).)*$ This is explained in http://stackoverflow.com/questions/406230/regular-expression-to-match-string-not-containing-a-word
This has been bugging me for a couple of weeks now, so I want to put it out where it might be noticed by a few more people. Increasingly there is an assumption that one can simply use UTF8 encoding on Unix-like filesystems without any problem. I'm pretty sure this is false; moreover, there is…
Yes, that's right, I'm already talking about next year's conference. To make sure we could get a reasonably sized room block in the hotel we've gone ahead and reserved Friday and Saturday 15 & 16 MAR, 2013 for our next conference. Go ahead, put it on your calendar, you know you want to. Please spread…
So this morning I got into work to find a that a database machine had crashed. This particular machine is a legacy, old machine (debian 4) that acts as a gateway between multiple systems so it has mounts to lots of other systems. It came back up cleanly, but two mounts did not remount properly…
When I was checking Eventbrite on the Cascadia conference registrations this morning I came across this (see below, click for full-size).
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.
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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…
Having screen provide session logging for each separate ssh session – this is very useful in case you ever need to “go back in time” and see what it was you did on the server Put this in your .screenrc file: # save the session logs logtstamp on logfile $HOME/.screenlogs/screenlog.%t.%Y-%M-%d.%c # the session log will…