14.Invokes pam_chauthok() to rejuvenate user’s authentication tokens.
15.Exits.
5.13.1.2chfn
The chfn program allows users to change their finger information. The finger command displays the information, stored in the /etc/passwd file. Refer to the chfn man page for detailed information. chfn generally follows these steps:
1.Sets language.
2.Gets invoking user’s ID.
3.Parses
4.Performs a check that a
5.Invokes pam_start() to initialize the PAM library and to identify the application with a particular service name.
6.Invokes pam_authenticate() to authenticate the application user. Generates an audit record to log the authentication attempt and its outcome.
7.Invokes pam_acct_mgmt() to perform
8.Invokes pam_chauthok() to rejuvenate the user’s authentication tokens.
9.Invokes pam_setcred() to set credentials.
10.Prompts for new finger information if not supplied on the command line.
11.Updates appropriate database files with new finger information.
12.Exits.
5.13.1.3chsh
The chsh program allows users to change their login shells. If a shell is not given on the command line, chsh prompts for one. Refer to the chsh man page for detailed information. chsh generally follows these steps:
1.Sets language.
2.Gets invoking user’s ID.
3.Parses
4.Performs a check that a
5.Performs a check to ensure that a
6.Invokes pam_start() to initialize the PAM library and to identify the application with a particular service name.
7.Invokes pam_authenticate() to authenticate the application user. Generates an audit record to log the authentication attempt and its outcome.
8.Invokes pam_acct_mgmt() to perform
9.Invokes pam_chauthok() to rejuvenate the user’s authentication tokens.
10.Checks the shell to make sure that it is accessible.
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