Configure DNS client (resolv.conf and nsswitch)

1. resolv.conf

Example:

nameserver 1.1.1.1
nameserver 8.8.8.8

2. nsswitch

Check order in /etc/nsswitch.conf (hosts: files dns).

3. Test

getent hosts example.com

4. Verify

Check /etc/hosts for local overrides.

Quick checklist

[ ] Steps completed
[ ] Config updated
[ ] Service tested
[ ] Restart/rollback ready
[ ] Logs checked

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