To check the status of the interface enp2s0: Network interfaces can be enabled or disabled using ip link set interface up|down, see ip-link(8). See /Ethernet#Device driver or /Wireless#Device driver.Įnabling and disabling network interfaces If your network interface is not listed, make sure your device driver was loaded successfully. See also /Wireless#Get the name of the interface. Wireless device names can also be retrieved using iw dev. Note that lo is the virtual loopback interface and not used in making network connections. link files.īoth wired and wireless interface names can be found via ls /sys/class/net or ip link. You can run udevadm test-builtin net_setup_link /sys/path/to/network/device as the root user to diagnose problems with.To change interface names, see #Change interface name and #Revert to traditional interface names.The system /usr/lib/systemd/network/99-default.link is generally sufficient for most cases.The default configuration assigns names to your network interface controllers using Predictable Network Interface Names, which prefixes interfaces names with en (wired/ Ethernet), wl (wireless/ WLAN), or ww (mobile broadband/ WWAN). Network interfaces are managed by udev and configured by systemd.link(5) files. NetworkManager does not use dhcpcd for DHCPv6, see NetworkManager#DHCP client.Wireless authentication must be configured separately with wpa_supplicant.Wireless authentication can be configured separately with wpa_supplicant or iwd.ISC advises no longer using it in production. No longer maintained as of early 2022.Yes (uses systemd-resolved or resolvconf) Yes (uses systemd-resolved, resolvconf or writes /etc/nf) Yes (runs a builtin resolver and writes /etc/nf) Note: Each network interface should be managed by only one DHCP client or network manager, so it is advised to run only one DHCP client or network manager on the system. You can run a traceroute to further diagnose the route to the host. If you receive an error message (see ping error indications) or no reply, this may be related to incomplete configuration, but also your default gateway or your Internet Service Provider (ISP). Note that computers can be configured not to respond to ICMP echo requests. For more information see the ping(8) manual. Ping is used to test if you can reach a host. Check if you can resolve domain names (e.g.9.9.9.9, which is a DNS server operated by the Quad9 Foundation and is a convenient address to test with). You can ping a public IP address (e.g.Your routing table is correctly set up.Your network interface has an IP address. The cable is plugged in or you are connected to the wireless LAN. Otherwise, check the device driver – see /Ethernet#Device driver or /Wireless#Device driver. Your network interface is listed and enabled.To troubleshoot a network connection, go through the following conditions and ensure that you meet them: is unclear, #Routing table does not explain what a correct setup looks like.
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