Ubuntu – Activate/deactivate Wi-Fi on Lenovo B5400 under Ubuntu 14.04


I have a Lenovo B5400 with Ubuntu 14.04 x64. The ethernet port works fine. How can I enable/disable the wifi connection? I have no hardware button for this functionality. Under Windows I can press Fn+F5 and a dialog window appears, but I cannot find this functionality under Linux.

lspci | grep Network produces:

04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter

The answer from here is incomplete; any other idea?


Later edit:
The output of rfkill list all is:

0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: yes
Hard blocked: yes

1: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no

2: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: yes

Best Answer

You can turn off your wifi using iwconfig.
To do that open a terminal and type the following command:

iwconfig wlan0 down

That should turn off your wifi. To turn it on you can use:

iwconfig wlan0 up

You can also turn it on/off using the wireless settings menu. Go to system setings → network → wireless. There you can turn it on/off. enter image description here enter image description here

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