Linux PAM

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Linux PAM
Stable release
1.4.0 / June 8, 2020; 7 months ago (2020-06-08)
Written inC
Operating systemLinux
LicenseGNU General Public License or Modified BSD License

Linux Pluggable Authentication Modules (PAM) provide dynamic authentication support for applications and services in a Linux system. Linux PAM is evolved from the Unix Pluggable Authentication Modules architecture.[1]

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.

See also[edit]


  1. ^ Fernandes, Savio; Reddy, KLM. "Securing Applications on Linux with PAM | Linux Journal". Linux Journal. Retrieved 2018-09-30.

External links[edit]