Red Hat NETWORK 3.1 - MANAGEMENT Reference Manual

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Chapter 5.Red Hat Network DaemonThe Red Hat Network Daemon (rhnsd) periodically connects to Red Hat Network to check for up-dates and notifications. The daemon, which runs in the background, is typically started from the ini-tialization scripts in /etc/init.d/rhnsd or /etc/rc.d/init.d/rhnsd.To check for updates, rhnsd runs an external program called rhn_check located in /usr/sbin/.This is a small application that actually makes the network connection to RHN. The Red Hat NetworkDaemon does not listen on any network ports or talk to the network directly. All network activity isdone via the rhn_check utility.5.1. ConfiguringThe Red Hat Network Daemon can be configured by editing the /etc/sysconfig/rhn/rhnsdconfiguration file. This is actually the configuration file the rhnsd initialization script uses. The mostimportant setting offered by the daemon is its check-in frequency. The default interval time is twohours (120 minutes). If you modify the configuration file, you must (as root) restart the daemon withthe command service rhnsd restart or /etc/rc.d/init.d/rhnsd restart.ImportantThe minimum time interval allowed is one hour (60 minutes). If you set the interval below one hour, itwill default to two hours (120 minutes).5.2. Viewing StatusYou can view the status of the rhnsd by typing the command service rhnsd status or/etc/rc.d/init.d/rhnsd status at a shell prompt.5.3. DisablingTo disable the daemon, (as root) run the ntsysv utility and uncheck rhnsd. You can also (as root)execute the command chkconfig rhnsd off. Using these two methods will only disable the ser-vice the next time the system is started. To stop the service immediately, use the command servicerhnsd stop or /etc/rc.d/init.d/rhnsd stop.5.4. TroubleshootingIf you are seeing messages indicating checkins are not taking place, the RHN client on your system isnot successfully reaching Red Hat Network. Make certain:• your client is configured correctly.• your system can communicate with RHN via SSL (port 443). You may test this by running thefollowing command from a shell prompt:telnet xmlrpc.rhn.redhat.com 443