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| Linux Security: Tips, Tricks, and Hackery |
| Published by Onsight, Inc. |
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This issue sponsored by Linuxfest Northwest 2003, Bellingham, WA,
April 26

LFNW is a showcase for what Northwest Linux users are doing with
Linux and open source software. It’s a place for Linux enthusiasts to
get together to share their passion for what good software can do.
This year’s fest will include boatloads of demonstrations, tutorials,
and lectures by gurus such as John “Mad Dog” Hall, Crispin Cowan,
Brian “Krow” Aker, and your very own Linux Security geek, Brian
Hatch.

Admission is free. For more information, see www.linuxnorthwest.com.
Come join the fun!

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Linux File Permission Confusion
By Brian Hatch

Summary: File permissions, the most basic form of security control
that exists on Unix-like systems, is still misunderstood by many.

Before I start, I really suggest anyone interested in Linux who is
near the US Pacific Northwest, check out and attend Linuxfest
Northwest this Saturday. We’ve got gurus, raffles, and swag galore,
and the whole event is free. I’ll be giving a Linux Security
presentation that promises to cover all Linux Security hooks in one
hour or less, so it’ll be a wild ride. See http://linuxnorthwest.com/
for more information.

Last week I gave a much-needed refresher on how file permissions
actually work, as opposed to how many people think they work. Just to
be complete, this week I’ll discuss how file permissions on
directories work, which operate slightly differently.

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