Become superuser or assume an equivalent role.
Verify whether the keyserv daemon is running.
# ps -ef | grep keyserv root 100 1 16 Apr 11 ? 0:00 /usr/sbin/keyserv root 2215 2211 5 09:57:28 pts/0 0:00 grep keyserv
Start the keyserver if the process isn't running.
# /usr/sbin/keyserv