服务器评测
有一张威盛无线网卡，挂载了一下，具体方法如下：
1、网上找到无线网卡驱动：vntwusb.ko;
2、加载无线网卡驱动：insmod vntwusb.ko;
- [root@ www.linuxidc.com plg]# insmod vntwusb.ko
- VIA Networking Wireless LAN USB Driver Ver. 1.20.03
- VIA Networking Wireless LAN USB Driver Ver. 1.20.03
- Copyright (c) 2004 VIA Networking Technologies, Inc.
- usb 1-1: reset full speed USB device using s3c2410-ohci and address 2
- usbcore: registered new interface driver vntwusb
3、查看无线网卡： iwconfig
- [root@ www.linuxidc.com plg]# iwconfig
- lo no wireless extensions.
-
- eth0 no wireless extensions.
-
- eth1 802.11-a/b/g ESSID:“”
- Mode:Managed Frequency=2.412 GHz Access Point: Not-Associated
- Bit Rate:1 Mb/s Sensitivity=0/255
- Retry min limit:8 RTS thr:off Fragment thr:off
- Encryption key:off
- Power Management:off
- Link Quality:0 Signal level:0 Noise level:0
- Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
- Tx excessive retries:0 Invalid misc:0 Missed beacon:0
-
- vntwpa no wireless extensions.
4、打开网卡： ifconfig eth1 up
- [root@ www.linuxidc.com plg]# ifconfig eth1 up
- Config_FileOperation file Not exist
- Zone=[2][E][U]!!
- Antenna MAIN available!
5、扫描无线网络：iwlist eth1 scanning
- [root@ www.linuxidc.com plg]# iwlist eth1 scanning
- eth1 Scan completed :
- Cell 01 – Address: 00:23:CD:15:60:40
- ESSID:”TP-LINK”
- Mode:Managed
- Channel:1
- Frequency:2.412 GHz (Channel 1)
- Quality=50/100 Signal level=-70 dBm Noise level=0 dBm
- Encryption key:off
- Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
- 12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s
- 48 Mb/s; 54 Mb/s
- Extra:bcn_int=100
- Cell 02 – Address: 00:23:89:97:BC:10
- ESSID:”H3C”
- Mode:Managed
- Channel:1
- Frequency:2.412 GHz (Channel 1)
- Quality=65/100 Signal level=-64 dBm Noise level=0 dBm
- Encryption key:off
- Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
- 11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
- 48 Mb/s; 54 Mb/s
- Extra:bcn_int=100
- Cell 03 – Address: 00:23:89:97:BC:11
- ESSID:”touzi-net”
- Mode:Managed
- Channel:1
- Frequency:2.412 GHz (Channel 1)
- Quality=65/100 Signal level=-64 dBm Noise level=0 dBm
- Encryption key:on
- Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
- 11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
- 48 Mb/s; 54 Mb/s
- Extra:bcn_int=100
- Cell 04 – Address: F4:EC:38:7B:5F:FE
- ESSID:”chengang”
- Mode:Managed
- Channel:6
- Frequency:2.437 GHz (Channel 6)
- Quality=100/100 Signal level=-40 dBm Noise level=0 dBm
- Encryption key:on
- Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
- 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
- 48 Mb/s; 54 Mb/s
- Extra:bcn_int=100
- IE: IEEE 802.11i/WPA2 Version 1
- Group Cipher : CCMP
- Pairwise Ciphers (1) : CCMP
- Authentication Suites (1) : PSK
6、扫描到无线网络后（这里是H3C），连接无密钥无线网络：iwconfig eth1 essid H3C
- [root@ www.linuxidc.com plg]# iwconfig eth1 essid H3C
- [root@ www.linuxidc.com plg]# AP(BSS) finding:Found a AP(BSS)..
- 802.11 Authen (OPEN) Successful.
- Association Successful, AID=6.
- Link with AP(SSID): H3C
7、连接好后，可以查看下无线网络：iwconfig eth1
- [root@ www.linuxidc.com plg]# iwconfig eth1
- eth1 802.11-a/b/g ESSID:“H3C”
- Mode:Managed Frequency=2.412 GHz Access Point: 00:23:89:97:BC:10
- Bit Rate=1 Mb/s Sensitivity=-60 dBm
- Retry min limit:8 RTS thr:off Fragment thr:off
- Encryption key:off
- Power Management:off
- Link Quality=88/100 Signal level:-60 dBm Noise level:0 dBm
- Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
- Tx excessive retries:0 Invalid misc:0 Missed beacon:0
8、设置eth1的ip地址，网关，DNS（H3C的网关为192.168.254.1，DNS为202.96.134.133）
- [root@ www.linuxidc.com plg]# ifconfig eth1 192.168.254.245 netmask 255.255.255.0
- [root@ www.linuxidc.com plg]# route add default gw 192.168.254.1
- [root@ www.linuxidc.com plg]# echo “nameserver 202.96.134.133”>> /etc/resolv.conf
注意：这里修改的值，在下次reboot后就没有了，如果要彻底修改的话，在linux系统中，可以用vi修改：vi /etc/sysconfig/network-scripts/ifcfg-eth0（修改这个在下次reboot后生效）。但是 嵌入式linux下面没有sysconfig这个目录，因此，具体方法看12。
9、修改完成后，就可以ping下网关了：
- [root@ www.linuxidc.com plg]# ping 192.168.254.1 -I eth1
- PING 192.168.254.1 (192.168.254.1): 56 data bytes
- 64 bytes from 192.168.254.1: seq=0 ttl=128 time=10.732 ms
- 64 bytes from 192.168.254.1: seq=1 ttl=128 time=3.418 ms
- 64 bytes from 192.168.254.1: seq=2 ttl=128 time=4.078 ms
- 64 bytes from 192.168.254.1: seq=3 ttl=128 time=4.095 ms
- 64 bytes from 192.168.254.1: seq=4 ttl=128 time=10.198 ms
10、然后ping下外网看看，这里ping下Linuxidc.com：
- [root@ www.linuxidc.com plg]# ping www.linuxidc.com -I eth1
- PING www.google.com (74.125.71.105): 56 data bytes
- 64 bytes from 74.125.71.105: seq=0 ttl=51 time=16.472 ms
- 64 bytes from 74.125.71.105: seq=1 ttl=51 time=18.067 ms
- 64 bytes from 74.125.71.105: seq=3 ttl=51 time=14.123 ms
- 64 bytes from 74.125.71.105: seq=4 ttl=51 time=13.120 ms
- 64 bytes from 74.125.71.105: seq=5 ttl=51 time=14.130 ms
11、上面是加载无密钥的ap，那么如果ap有密钥应该怎么办呢？这就要在linux下面查看下iwconfig这个命令的用法了。用man查看下这个命令。
[root@localhost ~]# man iwconfig
可以知道，这个命令加载有密钥（密钥为ccavccav）的方式如下：
[root@ www.linuxidc.com plg]# iwconfig eth1 essid chengang key ccavccav
但是，iwconfig只能加载密钥为wep的ap点，不能加载密钥为wpa的ap点。如果要加载wpa的ap点，就得用wpa_supplicant这个工具了。
12、关于嵌入式linux开机加载驱动和修改ip的方法：
可以修改/etc/init.d/rcS这个开机启动脚本，将上面这些命令加载到这些脚本里面。就不用每次开机都要配置了。
