Temporary failure in name resolution

Resolver failure is not the same as a dead host

The name never resolved, so no connection was attempted.

dig +short example.com
dig @1.1.1.1 +short example.com

If the public resolver answers and the local one does not, the problem is local configuration.

cat /etc/resolv.conf
resolvectl status 2>/dev/null

A host with an AAAA record and no working IPv6 route produces exactly this symptom for some resolvers. Test both families.

Scope: failure mode: Resolver problems versus a dead host.

CliHelper documents failure modes of third-party command line tools. No software is stored or distributed here.