Common commands for connecting wireless networks under Linux

Enable/restart/shutdown network services

/etc/init.d/networking start

/etc/init.d/networking restart

/etc/init.d/networking stop

Among them, networking is the name under Ubuntu, other systems have different names, such as OpenWrt called Network.

　

Enable/Disable the wireless card Wlan0 (also known as Ath0, customizable):

Ifdown Wlan0

Equivalent to Ifconfig wlan0 down

Ifup Wlan0

Equivalent to ifconfig wlan0 up

Scanning

Scan WLAN:

Iwlist scaning | More #iwlist是一个很好的命令, can scan the SSID, channel and other quantities

(different from IW list)

Set Wlan0:

Set the AP Name

Iwconfig wlan0 Essid "SSID"

Iwconfig Wlan0 Essid SSID

Iwconfig Wlan0 Essid-"any" (if the SSID has any,no, or off, preceded by "--")

Iwconfig Wlan0 Essid any

Iwconfig Wlan0 Essid off

But if the wireless network has encryption, it is more troublesome. The methods for AES, WPA, and WPA2 are different.

Wep:

Iwconfig wlan0 ESSID XXX key s:xxx

or by modifying/etc/network/interfaces, this configuration file is a variety of (optional) configuration of the NIC interface:

Iface eth0 inet Static

Address XX. Xx. Xx. Xx

Netmask XX. Xx. Xx. Xx

Gateway XX. Xx. Xx.1

Wireless-essid XXX

Wireless-key XXX

WPA/WPA2:

wpa_passphrase [ESSID] [password] >> <some path/xxx.conf> #这会由你输入的ESSID和密码形成一段结构化的文本, network{essid= ..... , }

Wap_supplicant-i wlan0-c <some path/xxx.conf>-D wext-b

Get address automatically

Dhclient Wlan0 (If an Ethernet port: dhclient eth0), a DHCP request is issued to the set SSID

Set Static Address

Iwconfig wlan0 XXX.XXX.XXX.XXX netmask XX. Xx. Xx. Xx

Add a static route (if the IP address is not a problem, you can also ping the IP of the must have plotted network segment but ping the host on the gateway, then check the route and DNS)

Route add default GW [gateway address] that is, all packages are forwarded through the gateway (since notebooks generally have only one gateway for egress)

Route add-net [Destip] netmask [netmask] Dev [interface] (see Man route)

Add/Modify DNS:

The DNS address is written in a configuration file:/etc/resolv.conf, modify it

Common commands for connecting wireless networks under Linux