Installation guide

The rhnmd package can be found in the Red Hat Network Tools channel for all Red Hat Enterprise
Linux distributions. To install it:
1. Subscribe the systems to be monitored to the Red Hat Network Tools channel associated with the
system. T his can be done individually through the System Details → Channels → Software
subtab or for multiple systems at once through the Channel Details → T arget Systems tab.
2. Once subscribed, open the Channel Details → Packages tab and find the rhnm d package
(under 'R').
3. Click the package name to open the Package Details page. Go to the T arget Systems tab,
select the desired systems, and click Install Packages.
4. Install the SSH public key on all client systems to be monitored, as described in Section 1.2.2.3,
“Installing the SSH key”.
5. Start the Red Hat Network monitoring daemon on all client systems using the command:
service rhnmd start
6. When adding probes requiring the daemon, accept the default values for RHNMD User and
RHNMD Port: nocpulse and 4 54 5, respectively.
1.2.2.2. Configuring SSH
If you wish to avoid installing the Red Hat Network monitoring daemon and opening port 4545 on client
systems, you may configure sshd to provide the encrypted connection required between the systems
and Red Hat Network. This may be especially desirable if you already have sshd running. To configure
the daemon for monitoring use:
1. Ensure the SSH package is installed on the systems to be monitored:
rpm -qi openssh-server
2. Identify the user to be associated with the daemon. This can be any user available on the system,
as long as the required SSH key can be put in the user's ~/.ssh/authorized_keys file.
3. Identify the port used by the daemon, as identified in its /etc/ssh/sshd_config configuration
file. The default is port 22.
4. Install the SSH public key on all client systems to be monitored, as described in Section 1.2.2.3,
“Installing the SSH key”.
5. Start the sshd on all client systems using the command:
service sshd start
6. When adding probes requiring the daemon, insert the values derived from steps 2 and 3 in the
RHNMD User and RHNMD Port fields.
1.2.2.3. Installing the SSH key
Whether you use rhnm d or sshd, you must install the Red Hat Network monitoring daemon public SSH
key on the systems to be monitored to complete the secure connection. To install it:
1. Navigate to the Monit oring → Scout Config Push page on the Satellite interface and click the
name of the scout that will monitor the client system. T he SSH id_dsa.pub key is visible on the
resulting page.
2. Copy the character string (beginning with ssh-dss and ending with the hostname of the Satellite).
3. Select Systems from the left menu, and click the checkbox next to the systems you want to send
Chapter 1. Red Hat Satellite Information
23