Reinstall shadow by running the following commands: patch -Np1 -i ../shadow-&shadow-version;-pam-1.patch && LIBS="-lpam -lpam_misc" ./configure --libdir=/usr/lib \ --enable-shared --with-libpam --without-libcrack && echo '#define HAVE_SETLOCALE 1' >> config.h && make && make install && mv /bin/sg /usr/bin && mv /bin/vigr /usr/sbin && rm /bin/groups && 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