Before the shadow Password Suite can be installed, the patch file must be unpacked. This patch fixes a compliation problem due to a variable being used but not defined. Install the Shadow Password Suite by running the following commands: patch -Np1 -i ../shadow-20001016.patch && ./configure --prefix=/usr && make && make install && cd etc && cp limits login.access /etc && sed "s|/var/spool/mail|/var/mail|" login.defs.linux > /etc/login.defs