On my Ubuntu 14.04.2 LTS network-manager isn't installed yet. Without this program I can't connect to WiFi network. But I can't install this package from Ubuntu without network connection. Here is my question. How to install this offline? or How to install from another computer?
1 Answers
You can connect to WiFi without network-manager (even though it should have been installed by default). Open a terminal and run:
sudo iwconfig
There will be some output like lo, eth0, wlan0
. The one we want is wlan
. Take note of its name (probably wlan0).
sudo nano /etc/network/interfaces
Go to the end of the file and create a new line. Write the following:
auto wlan0
Replacing wlan0 with what you found back there. In new lines:
iface wlan0 inet dhcp
wpa-ssid SSID
Replacing SSID
with the name of your WiFi connection.
wpa-psk password
Replacing password
with your WiFi network's password.
Hit Ctrl+O then Enter to save and Ctrl+X to exit. In the terminal, run:
sudo ifup wlan0
And you should be connected. You can now install network-manager and anything you want. Remember to remove everything you wrote from /etc/network/interfaces before using network-manager otherwise it won't work.

- 5,817
sudo iwconfig
command doesn't works. Command not found. – R.D.O Jan 22 '16 at 14:22sudo ifconfig
instead. – Eduardo Cola Jan 22 '16 at 14:51/etc/network/interface/
looks like this (without #):auto lo
(new line)iface lo inet loopback
(3 lines down)allow-hotplug eth0
(new line)iface eth0 inet dhcp
(new line)auto wlan0
(new line)iface wlan0 inet dhcp
(new line)wpa-ssid
(ssid) (new line)wpa-psk
(password). And information forsudo ifconfig
is: eth0, lo. I don't know what I have to do. – R.D.O Jan 24 '16 at 18:14dmesg | grep Network
and give me the output? – Eduardo Cola Jan 24 '16 at 18:31dmesg | grep Wireless
. – Eduardo Cola Jan 24 '16 at 18:32ifconfig
show wlan0. – R.D.O Jan 24 '16 at 18:43ifconfig
show wlan0.dmesg
command show a lot of text. – R.D.O Jan 24 '16 at 18:47sudo shutdown -h now
– Eduardo Cola Jan 24 '16 at 20:57