~$ rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
~$ lspci |grep -i 'network controller'
03:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
xslu@XS:~$ rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
xslu@XS:~$ sudo rfkill unblock all
[sudo] password for xslu:
xslu@XS:~$ rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: asus-wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
xslu@XS:~$