set system host-name 'R1' set system domain-name 'example.com' set system domain-search domain 'search.tld' commit delete system domain-name delete system domain-search commit
If we look to /etc/hosts and /etc/resolv.conf, all domain name stay here after delete from cli
vyos@vyos# sudo cat /etc/hosts ### Autogenerated by VyOS ### ### Do not edit, your changes will get overwritten ### # Local host 127.0.0.1 localhost 127.0.1.1 R1.example.com R1 vyos@vyos# sudo cat /etc/resolv.conf ### Autogenerated by VyOS ### ### Do not edit, your changes will get overwritten ### nameserver 8.8.8.8 nameserver 1.1.1.1 domain example.com search example.com search.tld