dh_installpam man page
dh_installpam — install pam support files
dh_installpam [debhelper options] [--name=name]
dh_installpam is a debhelper program that is responsible for installing files used by PAM into package build directories.
Installed into etc/pam.d/package in the package build directory.
Look for files named debian/package.name.pam and install them as etc/pam.d/name, instead of using the usual files and installing them using the package name.
This program is a part of debhelper.
Joey Hess <email@example.com>