Resolvconf
lastmod 2026-11-10created 2026-01-222 edits
resolvconf is a Linux framework that collects DNS server information reported by various network services such as DHCP clients, VPNs, and PPP, and updates /etc/resolv.conf consistently. Instead of each interface overwriting the file with its own settings directly, each one registers with resolvconf, which merges them by priority. WireGuard's wg-quick calls this command when applying the tunnel's DNS. In recent distributions, systemd-resolved often takes on the same role.