Understanding Your Security Responsibilities
A system is only as secure as its weakest link, and the system administrator has to be extremely cautious. Keeping on top of possible vulnerabilities is essential, especially if the system contains important data.
Choosing Good Passwords
Choosing a good password is very important. It is important to make sure it doesn't fall into the wrong hands, too! This is especially true for the superuser, root. Imagine someone gains access as superuser to the system. He can do anything he pleases, such as reading everyone's email and files or even erasing the whole system! Passwords should not be easy to guess. Having a password that is your birthday is not a good idea nor is having a password that is all numbers ...
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