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Red Hat sends out a monthly training newsletter, one of the more popular features of which is a "tips and tricks" section, to which I've contributed a couple of times. The one that went out this month is something I had no idea about, and is one of those things that makes me geeksquee enough that I feel the need to share, despite the fact that I will probably never need to use it, it's just cool.

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Q. Can I "hotplug" a CPU on a running Red Hat Enterprise Linux 5 system?

Red Hat Enterprise Linux 5 supports the cpu-hotplug mechanism, which allows for CPUs to be dynamically disabled and re-enabled on a system without requiring a system reboot.

In order to disable a CPU core in a running machine, use the file /sys/devices/system/cpu/cpuX/online.

The following command will disable a CPU:

# echo 0 > /sys/devices/system/cpu/cpuX/online

Where X is the ID of the CPU as determined from /proc/cpuinfo.

To re-enable the CPU, run:

# echo 1 > /sys/devices/system/cpu/cpuX/online

Check an example and more on this topic at the Red Hat knowledgebase.
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And now to spend the rest of the day resisting the urge to try this on my uniprocessor laptop...

Linux (or, to be fair, any OS) is like chess: you never know everything about it.


Edit: Oh, right, my laptop actually has two processors. Sadly the primary processory doesn't have an online file with which to disable it. Stupid sensible design. *nix is supposed to trust/hate me enough to let me screw myself over by doing braindead things if I want to! =;)

Costuming help!

Well, just when I thought I was going to be able to do all of my Festival costuming out of my own closet...

Does anyone happen to have anything that would stand a chance of fitting me and could pass for (part of) a clown outfit? I can probably put something along the lines of hobo!clown together from what I've got, but it cant' hurt to ask.

Also, face paint. Could, maybe should, just run to Boston Costume for this, but again if anyone's got some they wouldn't mind me using a possibly excessive amount of, that'd be swell. Having done face painting for kids once upon a time, I kind of like the idea of designing and implementing this myself, but I've never painted my own face before, so if anyone on my flist has aspirations in this direction and would like to have a go at me, lemme know (must be at Festival on Saturday, you can probably guess which game).

'Tis no Deceit to Deceive the Deceiver

Re-posting for people who aren't on the bscflarp mailing list.

If you are in the Boston area, like theater-style larps and like to sing, then the only game I know of that combines the two is being re-run for the first time since I played in it about four years ago. It had its flaws, but it's a four-hour game with more complex, interconnecting plots than some weekend-long games I've played, and I was never bored because it's hard to do that when people are randomly bursting into song. This game is also the origin of The Legendary Golden Pants, so you even get to experience a piece of larp history! =;) It will be running April 26th from 4:30p-8:30p at Brandeis.


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(no subject)

tiurin wins for sending me this. I only wish I'd thought of it myself.