libpam0g-dev

Package contains libraries, required by other applications as dependencies. Do not install separately.

Development files for PAM
Contains C header files and development shared libraries for libpam, the
pluggable authentication modules, a suite of shared libraries that enable
the local system administrator to choose how applications authenticate
users.
.
PAM decouples applications from the authentication mechanism, making it
possible to upgrade the authentication system without recompiling or
rewriting the applications.