![]() ![]() In combination with -4 option, we will only see IPv4 addresses. Ip has -o option which allows putting all information on single line - this is useful for parsing with tools like awk or perl. To check your external IP address (the one that the servers on the Internet see when you connect to them - which may be different than the internal IP address described here) see this answer. It's useful when your target is on a LAN, VPN or other special network, in which case some other IP could be used for connections than the default IP for reaching the Internet. The default target is 8.8.8.8 which is the Google's public DNS resolver and a good default for the Internet.īut if you run it with a different IP: internalip 127.2.3.4īecause that is your IP address that would be used to connect with 127.2.3.4 on the loopback interface. I use it in the internalip script in my scripts collection on GitHub, which you can install with: wget Īnd you will get your IP address that would be used to connect with the TARGET IP address. This will test not only that you have a correct IP configured on some interface (like with parsing the output of ifconfig) but also that you have the routing table configured to use it correctly. you are connected with both ethernet and wifi or via VPN etc.). and you will always get the IP address that is currently used for Internet connections at that very moment (important when e.g. The advantage of that command is that you don't have to know which interface you are using (eth0? eth1? or maybe wlan0?), you don't have to filter out localhost addresses, or Docker addresses, or VPN tunnels etc. This is what I currently recommend: ip route get 8.8.8.8 | awk '' The ethernet line goes from the network card to a switch, and then to a modem/router from there. As far as my network topology goes, I have a pci-e network card for the pc. I haven't done anything that would have affected the internet setup So i'm not sure why it doesn't work anymore. I think the power went off one day 2 months ago and I never turned the server back on until yesterday. I set up owncloud and webmin a few months ago and was using them for a month with no problems. The output of host was: connection timed out no servers could be reached. If someone could edit this for me, the contents of etc/network/interfaces should be on separate lines. Here are the contents of /etc/network/interfaces: # The loopback network interface ![]() Tx packets:1800 errors:0 dropped:0 overruns:0 carrier:0 RX packets:1800 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0Įth1 link encap:Ethernet HWaddr 00:16:ec:05:c8:9c RX packets:0 errors:0 dropped:0 overruns:0 frame:0 Here is the output of ifconfig -a: eth0 link encap:Ethernet HWaddr 00:06:4f:4a:66:f0 When I do the command ifconfig, I cannot find my internal IP address. I have Ubuntu server 12.04 installed, so I have no GUI.
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