service patchman stop
yum update -y patchman-client
rm -Rf /var/lib/patchman/
mkdir -p /var/lib/patchman/{quarantine,tmp}
chgrp patchman /var/lib/patchman/
chmod 700 /var/lib/patchman/*
chmod 711 /var/lib/patchman/
rm -rf /etc/patchman/license/key
echo "YOUR_KEY" >> /etc/patchman/license/key
chmod 777 /etc/patchman/license/key
service patchman start

Please replace YOUR_KEY with the license key that you can find in the Patchman Portal under the "Server -> Add server" menu.

Please allow the Patchman client a maximum of 15 minutes to register itself with the Patchman Portal.