Topic: Install Docu: /etc/hosts declaration for FQDN
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why is it worth for a "Warning" notice inside the ubuntu install ducumentation?
/etc/hosts: hostname <=> IP address mapping. Warning: List the FQDN hostname as first item. # Part of file: /etc/hosts 127.0.0.1 mx.example.com demo localhost localhost.localdomain
Which service get in trouble if it looks like:
127.0.0.1 demo localhost localhost.localdomain mx.example.com
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