shadow requires: Download the patch for shadow from . Reinstall shadow by running the following commands: patch -Np1 -i ../shadow-4.0.3.patch && autoconf && LDFLAGS="-lpam -lpam_misc" ./configure --prefix=/usr --libdir=/usr/lib \ --enable-shared --with-libpam && make && make install && rm /bin/vipw && mv /bin/sg /usr/bin && mv /usr/lib/lib{misc,shadow}.so.0* /lib && ln -sf ../../lib/libshadow.so.0 /usr/lib/libshadow.so && ln -sf ../../lib/libmisc.so.0 /usr/lib/libmisc.so && cp debian/securetty /etc/securetty