I had problems with network manager on ubuntu , so i set up static networking. You can follow these steps and it will work ( i configured only wlan0 because i use wireless , you just need to skip the wireless related things in it)
Show your interfaces:
$ ip a show
Note the default Ethernet and wifi interfaces:
It looks like our Ethernet port is eth0. Our WiFi radio is wlan0. Want to make this briefer?
$ ip a show | awk '/^[0-9]: /{print $2}'
The output of this command will look something like this:
lo:
eth0:
wlan0:
Your gateway IP address is found with:
route -n
It provides access to destination 0.0.0.0 (everything). In the below image it is 192.168.0.1, which is perfectly nominal.
route-n
Let’s do a bit of easy configuration in our /etc/networking/interfaces file. The format of this file is not difficult to put together from the man page, but really, you should search for examples first.
interfaces
Plug in your Ethernet port.
Basically, we’re just adding DHCP entries for our interfaces. Above you’ll see a route to another network that appears when I get a DHCP lease on my Ethernet port. Next, add this:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet dhcp
auto wlan0
iface wlan0 inet dhcp
Next, enable and start the networking service:
sudo update-rc.d networking enable
sudo /etc/init.d/networking start
Let’s make sure this works, by resetting the port with these commands:
sudo ifdown eth0
sudo ip a flush eth0
sudo ifup eth0
This downs the interface, flushes the address assignment to it, and then brings it up. Test it out by pinging your gateway IP: ping 192.168.0.1. If you don’t get a response, your interface is not connected or your made a typo.
Let’s “do some WiFi” next! We want to make an /etc/wpa_supplicant.conf file. Consider mine:
network={
ssid="CenturyLink7851"
scan_ssid=1
key_mgmt=WPA-PSK
psk="4f-------------ac"
}
Now we can reset the WiFi interface and put this to work:
sudo ifdown wlan0
sudo ip a flush wlan0
sudo ifup wlan0
sudo wpa_supplicant -Dnl80211 -c /root/wpa_supplicant.conf -iwlan0 -B
sudo dhclient wlan0
That should do it. Use a ping to find out, and do it explicitly from wlan0, so it gets it’s address first:
$ ip a show wlan0 | grep "inet"
Presumably dhclient updated your /etc/resolv.conf, so you can also do a:
ping -I 192.168.0.45 www.yahoo.com
you’re now running without NetworkManager!
