Re: Mail has quit working

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On 08/29/2018 06:54 PM, TE Dukes wrote:
Added back the IPV6 to /etc/hosts a couple days ago for grins and giggles.
No longer getting IPV6 errors in logwatch for bind. Everything working.

I think removing my ISP's nameservers from /etc/resolv.conf was the fix.


I just caught up on the thread.  It looks like the core issue was never actually resolved:  "getent hosts localhost" still doesn't return the expected result, right?

    $ getent hosts localhost
    ::1             localhost localhost.localdomain localhost6 localhost6.localdomain6
    $ grep ^hosts /etc/nsswitch.conf
    hosts:      files dns myhostname

If you're not getting the expected result from "getent", and if your nsswitch.conf lists "files", then glibc is somehow broken.  "rpm -V glibc" might tell you how, or it might not.  Could be that glibc can't load /lib64/libnss_files.so.2.

In any case, DNS is now providing you with a result for "localhost", and that'll work around most of the problems, but you really should take steps to fix glibc.  With something that low-level broken, I'd urge you to build a new system from scratch, and automate the build with some configuration management tool this time, so that the next time you need to rebuild, you can do it quickly.
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