bespokoid · October 13, 2019 21:14 · Oct 13, 2019
diff --git a/linux_wifi_setup.md b/linux_wifi_setup.md
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+
+# Connecting to wifi network through command line
+
+I am trying to connect to my WEP network just using the command-line (Linux).
+
+I run:
+
+    sudo iwconfig wlan0 mode Managed essid 'my_network' key 'xx:xx:... hex key, 26 digits'
+
+Then I try to obtain an IP with
+
+    sudo dhclient -v wlan0
+
+or
+
+    sudo dhclient wlan0
+
+without success (tried to ping google.com).
+
+I know that the keyword is right, and I also tried with the ASCII key using 's:key', and again, the same result.
+
+I get the message below when running dhclient:
+
+    Listening on LPF/wlan0/44:...
+    Sending on   LPF/wlan0/44:...
+    Sending on   Socket/fallback
+    DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3 
+
+I have no problem connecting with WICD or the standard Ubuntu tool.
+
+## Option 1
+
+Just edit /etc/network/interfaces and write:
+
+    auto wlan0
+    iface wlan0 inet dhcp 
+                    wpa-ssid {ssid}
+                    wpa-psk  {password}
+
+After that write and close file and use command:
+
+    sudo dhclient wlan0
+
+Replace {ssid} and {password} with your respective WiFi SSID and password.
+
+## Option 2
+
+Provided you replace your Wireless network card, Wi-Fi Network name, and Wi-FI Password this should also work.
+
+I am using: - Wireless network card is wlan0 - Wireless network is "Wifi2Home" - Wireless network key is ASCII code ABCDE12345
+
+First, get your WiFi card up and running:
+
+    sudo ifconfig wlan0 up
+
+Now scan for a list of WiFi networks in range:
+
+    sudo iwlist wlan0 scan
+
+This will show you a list of wireless networks, pick yours from the list:
+
+    sudo iwconfig wlan0 essid Wifi2Home key s:ABCDE12345
+
+To obtain the IP address, now request it with the Dynamic Host Client:
+
+    sudo dhclient wlan0
+
+You should then be connected to the WiFi network. The first option is better, because it will be able to run as a cron job to start up the wifi whenever you need it going. If you need to turn off your WiFi for whatever reason, just type:
+
+    sudo ifconfig wlan0 down
+
+FYI
+I have also seen people using alternative commands. I use Debian, Solaris and OSX, so I'm not 100% sure if they are the same on Ubuntu. But here they are:
+
+  sudo ifup wlan0 is the same as sudo ifconfig wlan0 up
+  sudo ifdown wlan0 is the same as sudo ifconfig wlan down
+
+## Best option
+
+There is Danijel J's two options are good, but there is also a 3rd option if you have this working via the 'standard Ubuntu tool' using nmcli, which should already be installed at /usr/bin/nmcli.
+
+First, run
+
+    nmcli c
+
+This will list your connections, with the first column being the SSID, and the second column being the UUID of the connection.
+
+Copy the UUID of the SSID you want to connect to so you can paste it into the next command.
+
+Next, run
+
+    nmcli c up uuid <paste uuid here>
+
+and this will, using the same stuff as the 'standard Ubuntu tool' connect to your wifi!
+
+## Second best option 
+
+If you have nmcli installed, I think this is the simplest solution.
+
+For a new connection:
+
+    nmcli dev wifi connect <mySSID> password <myPassword>
+
+Or if a connection was already set up:
+
+    nmcli con up <mySSID>
+
+(or if that does not work, try nmcli con up id <mySSID>)