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A Red Hat training course is available for Red Hat Satellite

2.4.8. Fully Qualified Domain Name

Red Hat Satellite requires the installation to resolve its own fully qualified domain name (FQDN) properly. If this is not the case, cookies will not work properly on the web interface.
Verify that the server can resolve its FQDN. The expected output of this command is the host's FQDN.
# hostname -all-fqdns


It is important that the hostname of a Red Hat Satellite contains no uppercase letters. A hostname that includes uppercase letters can cause jabberd to fail.
If, at any point, you change your Red Hat Satellite hostname, see Section 8.3, “Changing the Red Hat Satellite Hostname”.