Pervasive Code

Pretty much every Unix user knows about the kill command, and most know about ‘kill -KILL’ aka ‘kill -9′.

But do you know about kill -STOP and kill -CONT?
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Argh! I spent about 5 hours yesterday troubleshooting a failed Ubuntu Jaunty -> Karmic (9.04->9.10) upgrade. It worked fine until I rebooted and then failed to boot. Here’s how I fixed it.
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Once again Ubuntu Linux proves itself to be easy to upgrade. Going from 9.04 to 9.10 (one release newer, since their numbering is bsaed on dates) was easy, but included the standard sprinkling of manual re-customization that I’ve come to expect from Debian based systems.
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I’m at WordCamp San Francisco today and decided that running a year old version of WordPress (on a year old version of Ubuntu Linux) was undesirable. So, with the confidence that comes from many relatively easy Ubuntu OS upgrades, I charged ahead. For (I think) the second time ever, things went badly. Here’s what I did and how I fixed it.
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I just did this yesterday; you can pretty much just follow my CentOS 5.1 Minimal VPS Install Guide.

The differences are:

• When you get to the “More Minimizing” section, yum -C grouplist will show a package called “Yum Utilities” which you probably want to leave installed.
• The Deployment_Guide-en-US file is not there so you don’t need to remove it.

That’s it.

I should also note that downloading a 3.9GB DVD ISO image in order to build a ~700MB installed OS may not be very efficient. I didn’t bother looking for a network installer but that might be the way to get this done faster.