As the name implies, the Red Hat Network Configuration Client (rhncfg-client) is installed and run from an individual client system. From there you may use it to gain knowledge about how RHN deploys configuration files to the client.
The Red Hat Network Configuration Client offers these primary modes: list, get, channels, diff, and verify.
To list the configuration files for the machine and the labels of the config channels containing them, issue the command:
rhncfg-client list |
The output resembles the following list:
Config Channel File config-channel-17 /etc/example-config.txt config-channel-17 /var/spool/aalib.rpm config-channel-14 /etc/rhn/rhn.conf |
These are the configuration files that apply to your system. However, there may be duplicate files present in the other channels. For example, issue the following command:
rhncfg-manager list config-channel-14 |
and observe the following output:
Files in config channel 'config-channel-14' /etc/example-config.txt /etc/rhn/rhn.conf |
You may then wonder where the second version of /etc/example-config.txt went. The rank of the /etc/example-config.txt file in config-channel-17 was higher than that of the same file in config-channel-14. As a result, the version of the configuration file in config-channel-14 is not deployed for this system, although the file still resides in the channel. The rhncfg-client command does not list the file because it will not be deployed on this system.
To download the most relevant configuration file for the machine, issue the command:
rhncfg-client get /etc/example-config.txt |
You should see output resembling:
Deploying /etc/example-config.txt |
You may then view the contents of the file with less or another pager. Note that the file is selected as the most relevant based upon the rank of the config channel containing it. This is accomplished within the Configuration tab of the System Details page. Refer to Section 6.4.2.8 System Details for instructions.
To view the labels and names of the config channels that apply to the system, issue the command:
rhncfg-client channels |
You should see output resembling:
Config channels: Label Name ----- ---- config-channel-17 config chan 2 config-channel-14 config chan 1 |
The following table lists the options available for rhncfg-client get:
To view the differences between the config files deployed on the system and those stored by RHN, issue the command:
rhncfg-client diff |
The output resembles the following:
--- /tmp/@3603.0.rhn-cfg-tmp 2004-01-13 14:18:31.000000000 -0500 +++ /etc/example-config.txt 2003-12-16 21:35:32.000000000 -0500 @@ -1,3 +1,5 @@ +additional text |
In addition, you may include the --topdir option to compare config files in RHN with those located in an arbitrary (and unused) location on the client system, like so:
[root@ root]# rhncfg-client diff --topdir /home/test/blah/ /usr/bin/diff: /home/test/blah/etc/example-config.txt: No such file or directory /usr/bin/diff: /home/test/blah/var/spool/aalib.rpm: No such file or directory |
To quickly determine if client configuration files are different than those associated with it via RHN, issue the command:
rhncfg-client verify |
The output resembles the following:
modified /etc/example-config.txt
/var/spool/aalib.rpm |
The file example-config.txt is locally modified, while aalib.rpm is not.
The following table lists the options available for rhncfg-client verify: