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I'm a beginner in AIX and I have 2 questions on AIX's passwd file.

  1. If there is a hash (#) symbol in front of a username, what does this mean?
  2. Correct me if I'm wrong. On the password field, if a user has password, it will be marked with an asterisk symbol (*). If a user does not have a password, it is marked with an exclamation mark (!) and that the account is locked / blocked.


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have you read the manpage? Or IBM's most excellent documentation (check out the "files reference" section, or search)? The answer to at least one of your questions is in the documentation - The other may be as well... – voretaq7 Jul 10 '12 at 3:37
  1. The hash in front of a username means that the user effectively does not exist. This is a TERRIBLE way to remove a user though. If you want to remove user, make sure you use rmuser. If you want to lock an account do chuser account_locked=true.

  2. This is incorrect.

To see if a user has a password or not, check /etc/security/passwd. If there is no password hash underneath the users name, then they do not have a password set. To check to see if a user is locked, do lsuser <user> and look for account_locked.

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