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This alternative addresses NetworkManager and systemd-networkd configuration ownership, not the specific issue of Hostnamectl and durable host identification: Inspect `systemctl` service state, NetworkManager device management, /etc/systemd/network and active connection profiles alongside `ip` state.

That option would use `ip link` and `ip addr` to examine and adjust temporary interface state and repair the persistent manager configuration where required, but it addresses a different concern. A transient hostname change is not necessarily persisted; hostname resolution and the configured system hostname are related but distinct functions.

This shortcut is unsafe for the present Linux issue: Assume the command `hostname newname` persistently changes every host identification file and DNS record automatically. A transient hostname change is not necessarily persisted; hostname resolution and the configured system hostname are related but distinct functions.

That option would assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

That option would inspect and configure the appropriate `nmcli device wifi` and connection profile settings with approved authentication, secrets and autoconnect preferences, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

That option would use `nmcli connection` to edit the correct NetworkManager profile's IPv4 method, addresses, gateway and activation settings, then reapply deliberately, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

This alternative addresses NetworkManager and systemd-networkd configuration ownership, not the specific issue of Local hosts resolution versus DNS settings: Different Linux networking managers apply persistent interface settings through their own configurations; conflicting ownership can cause changes to be ignored or overwritten. conf expecting to bypass the hosts entry. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

This alternative addresses TCP versus UDP versus ICMP diagnostics, not the specific issue of Local hosts resolution versus DNS settings: TCP, UDP and ICMP have different roles; UDP does not inherently acknowledge or reorder delivery and ICMP ping behavior does not establish application TCP availability. conf expecting to bypass the hosts entry. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. conf expecting to bypass the hosts entry.

This alternative addresses NetworkManager and systemd-networkd configuration ownership, not the specific issue of Local hosts resolution versus DNS settings: Inspect `systemctl` service state, NetworkManager device management, /etc/systemd/network and active connection profiles alongside `ip` state.

This alternative addresses Linux routing tables and default gateway selection, not the specific issue of Local hosts resolution versus DNS settings: Examine `ip route show`, `ip route get` for a remote address, next-hop reachability and persisted route configuration. conf expecting to bypass the hosts entry. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This alternative addresses TCP versus UDP versus ICMP diagnostics, not the specific issue of Local hosts resolution versus DNS settings: The selected transport matches reliability requirements and diagnostics distinguish blocked ICMP from a reachable TCP service. conf expecting to bypass the hosts entry. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This alternative addresses Ip command address and link troubleshooting, not the specific issue of Local hosts resolution versus DNS settings: The intended link is administratively up with the expected address and persistent configuration remains stable after service restart. conf expecting to bypass the hosts entry. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. It cannot establish a safe correction. conf expecting to bypass the hosts entry. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

That option would assume a displayed Wi-Fi SSID guarantees valid credentials and that any automatically connected access point is the approved enterprise network, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

That option would assume fe80:: addresses are globally routable and that an IPv4 dotted-decimal netmask is required for every IPv6 interface, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

That option would assume all DNS queries always use TCP and that knowing port 53 alone identifies the transport without checking protocol, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

This alternative addresses Linux routing tables and default gateway selection, not the specific issue of Local hosts resolution versus DNS settings: Inspect `ip route` and selected `ip route get`, then set or repair the appropriate default route in the active manager or with `ip route` for a controlled temporary change. conf. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. conf.

That option would set the intended persistent static hostname with `hostnamectl` or supported distribution settings and validate local host mapping separately, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. It cannot establish a safe correction. conf. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

This alternative addresses Ip command address and link troubleshooting, not the specific issue of Local hosts resolution versus DNS settings: The iproute2 command changes and reports kernel interface state, while durable settings are managed by the host's networking service. conf. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This alternative addresses NetworkManager persistent wired connection profiles, not the specific issue of Local hosts resolution versus DNS settings: `ip` changes running kernel networking state, while NetworkManager connection profiles define persistent settings managed across restarts. conf. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. It cannot establish a safe correction. conf. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

That option would inspect `nmcli connection show`, device status, saved connection properties, live `ip addr` and route after reconnect or reboot, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

That option would inspect protocol-specific packet traces and socket details, run both ICMP and application-layer reachability tests, and check filtering rules, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

This alternative addresses NetworkManager and systemd-networkd configuration ownership, not the specific issue of Local hosts resolution versus DNS settings: Only the chosen manager owns the interface and configuration survives a controlled network-service restart without unexpected overrides. conf. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This alternative addresses TCP versus UDP versus ICMP diagnostics, not the specific issue of Local hosts resolution versus DNS settings: The selected transport matches reliability requirements and diagnostics distinguish blocked ICMP from a reachable TCP service. conf. Linux principle: Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration. Appropriate response: Review hosts lookup precedence in nsswitch.conf and maintain the correct /etc/hosts and resolver settings for each source. Root-cause evidence: Compare `getent hosts name`, /etc/nsswitch.conf hosts line, /etc/hosts entry and DNS-only `dig` output. Independent acceptance: Host resolution follows the documented local and DNS precedence without stale overrides for the service name.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

That option would inspect `ip -6 addr`, `ip -6 route`, router advertisements and a scoped ping6 to the link-local destination, but it addresses a different concern. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.

This alternative addresses NetworkManager Wi-Fi authentication and saved profiles, not the specific issue of Local hosts resolution versus DNS settings: Inspect and configure the appropriate `nmcli device wifi` and connection profile settings with approved authentication, secrets and autoconnect preferences. conf.

This shortcut is unsafe for the present Linux issue: Assume editing /etc/resolv.conf always overrides a conflicting /etc/hosts entry regardless of NSS hosts order. conf. Name Service Switch controls whether hosts files and DNS are queried and in what order, while resolv.conf primarily identifies recursive resolver configuration.