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Using a secure system

How system security works

Login security

What to do if you cannot log in

Password security

Changing your password
    If you are not allowed to change your password
    If you are allowed to change your password

File security
    Security for files in sticky directories

Other security tips

Using su to access another account

Using commands on a trusted system
    Authorizations
    Listing authorizations and running authorized commands

Data encryption
    crypt--encode/decode files