Sometimes you have multiple records where the same data spans across multiple columns in the table and you’d like to clean up that mess by leaving only one copy per unique set of records.
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This post explains how to install a global RVM (Ruby Version Manager) with Passenger 3 gem, Ruby Enterprise Edition in a Debian server machine for all users.

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To set up this software under your Applebook, you have to download MySQL first. Go to MySQL download page and fetch an appropriate version for your system, depending if it 32 or 64 bits.
I’m having MacBook Pro with Intel Core 2 Duo.
Ergo, this is 64-bit architecture, ergo, I’ve chosen to download Mac OS X ver. 10.6 (x86, 64-bit), DMG Archive.
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You probably see this error when you are trying to start apache with /etc/init.d/apache2 start and there is no effect.
This error is caused by not clearing semaphores by apache and/or mod_fcgid and/or mod_passenger.
You can see the list of semaphores with the command ipcs -s.

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