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1.3.1 / May 18, 2018
|License||GNU General Public License or Revised BSD License|
Linux Pluggable Authentication Modules (PAM) provide dynamic authentication support for applications and services in a Linux or GNU/kFreeBSD system. Linux PAM is evolved from the Unix Pluggable Authentication Modules architecture.
Linux-PAM separates the tasks of authentication into four independent management groups:
- account modules check that the specified account is a valid authentication target under current conditions. This may include conditions like account expiration, time of day, and that the user has access to the requested service.
- authentication modules verify the user's identity, for example by requesting and checking a password or other secret. They may also pass authentication information on to other systems like a keyring.
- password modules are responsible for updating passwords, and are generally coupled to modules employed in the authentication step. They may also be used to enforce strong passwords.
- session modules define actions that are performed at the beginning and end of sessions. A session starts after the user has successfully authenticated.
- Linux-PAM page
- pam.d(8) - Linux man page
- Development site for the Linux-PAM project
- Understanding PAM, by A.P. Lawrence
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