PREIN

/bin/sh

/usr/bin/getent group munin >/dev/null || \
  /usr/sbin/groupadd -r munin
/usr/bin/getent passwd munin >/dev/null || \
  /usr/sbin/useradd -r -g munin -d /var/lib/munin -s /sbin/nologin \
    -c "Munin user" munin
exit 0