I'm installing XE 18c on Centos 7. My machines hostname is a fully qualified name, ie: xe18.myhost.com and there is an entry in /etc/hosts for this name. It also translates to a valid public domain name.
Still I'm getting an error message when running oracle-xe-18c configure: No valid IP Address returned for the host xe18.myhost.com
Funnily, when running oracle-xe-18c configure a second time (in the same session, right after the first fail), it works.
Any ideas why that is happening?