if [ -x /usr/sbin/useradd ]; then \
 /usr/bin/getent group proxy >/dev/null || (/usr/sbin/groupadd -f -r proxy || true); \
 /usr/bin/getent passwd proxy >/dev/null || (/usr/sbin/useradd -UMr -s /bin/false -c 3proxy proxy || true); \
fi