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Summary
Maintaining a secure Linux system requires
that you understand a great deal about how Linux (or UNIX generally) operates. You
must be able to identify and shut down unnecessary servers, create user
accounts as securely as possible, update software to fix security bugs, and
keep your eyes open for successful and attempted intrusions. Because the
security landscape is constantly changing, you must maintain your knowledge by
monitoring security-related Web sites, mailing lists, and newsgroups. Although
this sounds like a daunting task, once you're familiar with Linux you can keep
yourself up to date by spending just a few minutes a day on the task. The time
you take to improve your system's security will likely pay off at some point
when a crack attempt is thwarted.
discussion of security themes by covering some more specific security-related
topics.
