OneLinersCommand workbench
Verified diagnostic signature

A hostname could not be resolved to a usable address.

Match output from dns, understand the likely cause, then continue with sourced, read-only checks.

Confidence
high
Platforms
linux · macos · windows
Verified
2026-07-24
Recognized output

Signature matched locally

Name or service not known

OneLiners matches this pattern in your browser. Your pasted output is not stored or indexed.

Likely causes

What usually produces this signal

  1. Missing record
  2. Resolver or delegation failure
  3. Search-suffix mismatch
  4. Transient resolver outage
Safe next checks

Collect evidence before changing the system

01

Resolve a hostname to its IP address

dig +short <domain>

The output matches the expected target and exits without an error.

02

Query the useful DNS record set for a domain

for type in A AAAA MX NS TXT CAA; do echo "--- $type ---"; dig +short <domain> $type; done

The output matches the expected target and exits without an error.

03

Resolve a DNS name in PowerShell

Resolve-DnsName <domain>

The output matches the expected target and exits without an error.