Unix as a Second Language
by Sandra Henry-Stocker

Sandra Henry-Stocker has been administering Unix systems for more than 18 years. She describes herself as "USL" (Unix as a second language) but remembers enough English to write books and buy groceries. She currently works for TeleCommunication Systems, a wireless communications company, in Annapolis, Maryland, where no one else necessarily shares any of her opinions. She lives on a small farm on Maryland's Eastern Shore.

This blog offers advice for every-day Unix systems administration and some clever ways to approach more challenging problems.

Send comments and suggestions to mailto:bugfarm@gmail.com.

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Unix tip: Monitor disk arrays with sccli commands

Disk arrays take a lot of worry about disk failure off your shoulders, but that's no reason not to notice when one goes bad. The sccli command can tell you a lot about what's happening with your StorEdge arrays. Let it warn you about disks gone bad.

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Linux command: Side by side diff

Tired of looking at strings of "28,30d27" characters separating the differences between files you're comparing? Try a side by side diff listing that works the way your brain does.

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1 comment
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Unix commands: The best tool for the job

With Unix, there are always many ways to do a single thing, but sometimes one approach is just a lot better! Let's look at a couple examples of commands that are right for the job.

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Greening the Data Center

Think you're the only one having problems keeping your data center cool and powered up? Think again. At least the Green Grid (an international non-profit organization with a mandate to increase energy efficiency in the IT sector) is coming up with answers and I got to go to a trade show!

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Discovering PHP

It's no wonder that many content management systems are written in PHP. With enough practice, you could probably write one yourself. Check out this tutorial and cookbook for a head start on learning this extremely versatile language.

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Squeezing out the white space

Ever need to clean up some sloppy text? You can squeeze out extra white space with some very simple Perl commands. Let's take a look at how this works.

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Taking Control of ^h (control-h)

When your backspace key prints sequences of ^? following the text you meant to delete, you can abort what you're doing and start over again or you can fix the problem with stty.

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Using prtdiag to troubleshoot system problems

Those amber warning lights on your servers are trying to tell you something. Want to know what they're trying to tell you? Take a look at the output of the "prtdiag -v" command and you might learn more about your system than you knew could be known.

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Automating System Comparisons

When you run into a system problems, one of the first questions you might ask is "How is this system different from the others?". Let's take a look at how you can automate system comparisons and get your answers more quickly.

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Fake "Tech Support" Email

Occasional email from Tech Support can be very useful if it doesn't arrive so frequently that you tend to ignore it altogether. But what happens when email from Tech Support is just another phishing attempt by the bad guys? Make sure your users can easily spot the difference.

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