SUSE Manager Daemon (rhnsd)
The Uyuni daemon (
rhnsd) runs on traditional client systems and periodically connects with Uyuni to check for new updates and notifications.
It does not apply to Salt clients.
It is only used on SUSE Linux Enterprise 11 and Red Hat Enterprise Linux Server 6, as these systems do not use systemd.
On later operating systems, a systemd timer (
rhnsd.timer) is used and controlled by
Start the daemon with
By default, it checks every four hours for new actions. This means it can take some time for clients to execute scheduled actions.
To check for updates,
rhnsd runs the external
mgr_check program located in
This is a small application that establishes the network connection to Uyuni.
The Uyuni daemon does not listen on any network ports or talk to the network directly.
All network activity is performed by the
This figure provides an overview of the default
rhnsd process path.
All items left of the
Python XMLRPC server block represent processes running on a Uyuni client.
rhnsd initialization script has a configuration file on the client system at
An important parameter for the daemon is its check-in frequency. The default interval time is four hours (240 minutes). The minimum allowed time interval is one hour (60 minutes). If you set the interval below one hour, it changes back to the default of 4 hours (240 minutes).
If you modify the
rhnsd configuration file, execute this command as root to restart the daemon and pick up your changes:
To see the status of
rhnsd, use this command as root:
On SUSE Linux Enterprise 12 and later, the default time interval is set in
/etc/systemd/system/timers.target.wants/rhnsd.timer, in this section:
[Timer] OnCalendar=00/4:00 RandomizedDelaySec=30min
You can create an overriding drop-in file for
systemctl edit rhnsd.timer
For example, if you want configure a two hour time interval:
The file is saved as
For more information about systemd timers, see the