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ubuntu 14.04搭建wifi
  • ubuntu 14.04中已经有支持TL-WDN4800无线网卡的驱动：ath9k
  • 查看无线网卡状态
root@ubuntu-server-1:/home/caicloud# lshw -C network
*-network UNCLAIMED               
  description: Wireless interface

如出现 UNCLAIMED 则进行如下操作：

echo "options ath9k nohwcrypt=1" | sudo tee -a /etc/modprobe.d/ath9k.conf
sudo modprobe -rfv ath9k
sudo modprobe -v ath9k
  • 配置wifi
root@ubuntu-server-1:/home/caicloud# iwconfig 
wlan0     IEEE 802.11abgn 
          Mode:Managed  Frequency:5.745 GHz  Access Point: 28:C6:8E:9A:D0:20   
          Bit Rate=90 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=58/70  Signal level=-52 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:10   Missed beacon:0

添加wifi网络ID和密码，让每次系统启动时自动连接wifi:

root@ubuntu-server-1:/home/caicloud# cat /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant

network={
    ssid="XXXX"
    psk="XXXX"
}
root@ubuntu-server-1:/home/caicloud# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto p2p1
iface p2p1 inet dhcp

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
############################
#wpa-ssid xxxx
#wpa-psk xxxx
# 注: #如果按照如上方式的话，启动的时候会报错:
# Failed to connect to non-global ctrl_ifname: wlan0  error: Read-only file system
############################
pre-up wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf
  • 重启wlan0
sudo ifdown wlan0 && sudo ifup -v wlan0