User Database

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This section describes how to search and scan the database of registered users. The database itself is kept in the file /etc/passwd on most systems, but on some systems a special network server gives access to it.

Menu

• User Data Structure :: What each user record contains.
• Lookup User :: How to look for a particular user.
• Scanning All Users :: Scanning the list of all users, one by one.
• Writing a User Entry :: How a program can rewrite a user's record.