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 --enable-shared --with-libpam && make && make install && rm /bin/vipw && rm /bin/sg && mv /lib/{libmisc.*a,libshadow.*a} /usr/lib && mv /lib/{libmisc.so,libshadow.so} /usr/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