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Security 101

Authentication in unix

.. todo::
   Discuss how authention works.
   Touch on ``/etc/(passwd|group|shadow)``, hashing.
   What are groups? Lead in to the users/groups permissions model and how
   permissions are based on the user/group/other bits.

Adding and deleting users and groups

Standard unix filesystem permissions

PAM

Chroot, jails and containers

Sudo (or, "Why you should not log in as root")

History and Lore

The Morris Worm

http://www.snowplow.org/tom/worm/worm.html

/bin/false is not security

http://www.semicomplete.com/articles/ssh-security/