Linux Pluggable Authentication Module (PAM) Overview: Rock Solid Security
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| Linux PAM has become the standard authentication mechanism in most of
| the code developed today. Though developed by Sun Microsystems, most of
| the work on PAM is done on Linux platform. PAM has also been developed
| for Solaris 2.5 (full implementation will be realized on version 2.6)
| and HP-UX.
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