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ah00558 due to IP6 setup
Your article allowed me to successfully overcome this configerror.
FYinfo I'ld like to draw your attention to the UBUNTU etc/hosts -file
The error message pointed to IPaddr 127.0.1.1
my host file looks like this
#----------------------- copy of local file # current hosts file 127.0.0.1 localhost 127.0.1.1 mycomputername # ip6 loopback # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters #----------------------- end of copy of local file
according to [https://techpiezo.com/linux/etc-hosts-hosts-file-in-ubuntu-distribution/] 127.0.1.1 is a fully qualified domain name (FQDN) of the machine we are working on, and it is also for our localhost (needed for IPv6 capable hosts).
Using the above solution points Apache back to the IP4 local host
that raises the question : why doesn’t Apache2 understand the IP6 loopback entry as equivalent to the IP4 localhost entry and why does it by default look to the IP6 entry and ignores the IP4 entry, whereas the IP4 entry ?