[CentOS] System Start-Up Issue Progress
Alexander Dalloz
ad+lists at uni-x.org
Tue Jul 4 20:42:06 UTC 2017
Am 04.07.2017 um 19:13 schrieb Gordon Messmer:
> On 07/04/2017 09:21 AM, Chris Olson wrote:
>> It remains a mystery what could have happened during a standard yum
>> update of the system to cause this domain and/or host related sendmail
>> issue.
>
>
> Run "hostname". Has the hostname changed? Run "ls -l /etc/hosts
> /etc/resolv.conf". Have those files changed recently?
>
> It's possible that this system was working in the past because its
> hostname was set up in DNS, and was removed. In that case, the problem
> wasn't related to "yum." sendmail would (IIRC) continue working after
> the system's hostname was removed from DNS, until the next time the
> system rebooted.
Sendmail demands a hostname with at least a single dot in it. "computer"
is in no way a valid FQDN. "computer.localdomain" would be fine and if
it has an entry in /etc/hosts.
Alexander
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