Linux通过手机上网
1.安装相关软件;sudo apt-get install wvdial
2.得到GPRS的IP地址;(1);手机调整到usb lan模式，在手机打开一个网页，让它的GPRS连通;(2);运行 sudo /sbin/ifconfig;确认usb0存在;(3);运行 sudo /sbin/ifconfig usb0 192.168.1.1;配置电脑上的usb0的IP为192.168.1.1;(4);运行 telnet 192.168.1.2;telnet到手机，其中192.168.1.2为手机usb lan的IP，如下
$ telnet 192.168.1.2;Trying 192.168.1.2...;Connected to 192.168.1.2.;Escape character is '^]'.;;;;
;MontaVista(R) Linux(R) Consumer Electronics Edition 3.1;Linux/armv5tel 2.4.20_mvlcee31-mainstone_pxa27x;(none) login: root;MontaVista(R) Linux(R) Consumer Electronics Edition 3.1
No directory /root!;Logging in with home = "/".;# ifconfig;gprsv2;Link encap:Point-to-Point Protocol;;;inet addr:10.9.139.175; P-t-P:10.112.112.112; Mask:255.255.255.255;;;UP POINTOPOINT RUNNING NOARP MULTICAST; MTU:1500; Metric:1;;;RX packets:0 errors:0 dropped:0 overruns:0 frame:0;;;TX packets:0 errors:0 dropped:0 overruns:0 carrier:0;;;collisions:0 txqueuelen:50;;;RX bytes:8991 (8.7 Kb); TX bytes:5117 (4.9 Kb)
lo;;;;;Link encap:Local Loopback;;;inet addr:127.0.0.1; Mask:255.0.0.0;;;UP LOOPBACK RUNNING; MTU:16436; Metric:1;;;RX packets:24 errors:0 dropped:0 overruns:0 frame:0;;;TX packets:24 errors:0 dropped:0 overruns:0 carrier:0;;;collisions:0 txqueuelen:0;;;RX bytes:1392 (1.3 Kb); TX bytes:1392 (1.3 Kb)
gprsv2;Link encap:Point-to-Point Protocol;;;inet addr:10.10.88.48; P-t-P:10.112.112.112; Mask:255.255.255.255;;;UP POINTOPOINT RUNNING NOARP MULTICAST; MTU:1500; Metric:1;;;RX packets:0 errors:0 dropped:0 overruns:0 frame:0;;;TX packets:0 errors:0 dropped:0 overruns:0 carrier:0;;;collisions:0 txqueuelen:50;;;RX bytes:1025 (1.0 Kb); TX bytes:1023 (1023.0 b)
# exit;Connection closed by foreign host.;$;(5);由(4)得到gprsv2的IP为10.10.88.48，记录下来
3.为pppd添加GPRS IP;(1);运行 sudo gedit /etc/ppp/options;在options文件的最后一行添加如下两行内容;novj;:10.10.88.48;其中10.10.88.48为2.(5)所得到的GPRS IP地址
4.配置/etc/wvdial.conf并连接上网;(1);关掉手机的网页，确认手机上的GPRS连接已经断开;(2);手机调整到usb modem模式;(3);运行 wvdialconf;检测手机的modem连接是否正常，程序自动创建/etc/wvdial.conf文件，正确情况如下
$ wvdialconf;Editing `/etc/wvdial.conf'.
Scanning your serial ports for a modem.
WvModem<*1>: Cannot set information for serial port.;ttyS0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud;ttyS0<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud;ttyS0<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up.;Modem Port Scan<*1>: S1S2S3;WvModem<*1>: Cannot get information for serial port.;ttyACM0<*1>: ATQ0 V1 E1 -- OK;ttyACM0<*1>: ATQ0 V1 E1 Z -- OK;ttyACM0<*1>: ATQ0 V1 E1 S0=0 -- OK;ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK;ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK;ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK;ttyACM0<*1>: Modem Identifier: ATI -- ERROR;ttyACM0<*1>: Speed 4800: AT -- OK;ttyACM0<*1>: Speed 9600: AT -- OK;ttyACM0<*1>: Speed 19200: AT -- OK;ttyACM0<*1>: Speed 38400: AT -- OK;ttyACM0<*1>: Speed 57600: AT -- OK;ttyACM0<*1>: Speed 115200: AT -- OK;ttyACM0<*1>: Speed 230400: AT -- OK;ttyACM0<*1>: Speed 460800: AT -- OK;ttyACM0<*1>: Max speed is 460800; that should be safe.;ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK
Found an USB modem on /dev/ttyACM0.;Modem configuration written to /etc/wvdial.conf.;/etc/wvdial.conf<Warn>: Can't write '/etc/wvdial.conf.tmp8517': Permission denied;/etc/wvdial.conf<Warn>: Can't write '/etc/wvdial.conf' ('/etc/wvdial.conf'): Bad file descriptor;ttyACM0<Info>: Speed 460800; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0";$
(4);运行 sudo gedit /etc/wvdial.conf;修改其内容，Baud保持4.(3)中程序自动创建的值，Username和Password的值到手机的网络设置查看;本例使用CMNET连接，文件内容如下
[Dialer Defaults];Init1 = ATZ;Init2 = AT&FE0V1&C1S0=0;Init3 = AT+cgdcont=1,"IP","CMNET","",0,0;Modem Type = USB Modem;ISDN = 0;Phone = *99***2#;New PPPD = yes;Modem = /dev/ttyACM0;Username = 172;Password = 172;Baud = 460800;Idle Seconds = 3000;Auto DNS = 1;Stupid Mode = 1;Dial Command = ATD;Ask Password = 0;FlowControl = NOFLOW
(5);禁用eth0等网络联连接;另：如果是在Debian Gnome环境下，右上角的网络连接工具，“启用联网一项反选
(6);运行 sudo wvdial;让Linux通过手机上网，正常情况如下
$ sudo wvdial;--> WvDial: Internet dialer version 1.60;--> Cannot get information for serial port.;--> Initializing modem.;--> Sending: ATZ;ATZ;OK;--> Sending: AT&FE0V1&C1S0=0;AT&FE0V1&C1S0=0;OK;--> Sending: AT+cgdcont=1,"IP","CMNET","",0,0;OK;--> Modem initialized.;--> Idle Seconds = 3000, disabling automatic reconnect.;--> Sending: ATD*99***2#;--> Waiting for carrier.;CONNECT;--> Carrier detected.; Starting PPP immediately.;--> Starting pppd at Mon May 18 21:16:57 2009;--> Pid of pppd: 8931;--> Using interface ppp0;--> pppd: [10][18]1;--> pppd: [10][18]1;--> pppd: [10][18]1;--> pppd: [10][18]1;--> pppd: [10][18]1;--> local; IP address 10.55.0.37;--> pppd: [10][18]1;--> remote IP address 10.10.88.48;--> pppd: [10][18]1;--> primaryDNS address 211.136.20.203;--> pppd: [10][18]1;--> secondary DNS address 211.136.17.107;--> pppd: [10][18]1
收到local IP address说明网络连接成功，终端里按Ctrl+C终止网络连接
(7);验证上网效果
$ sudo /sbin/ifconfig;eth0;;;Link encap:Ethernet; HWaddr 00:F0:CF:81:F7:00;;;inet6 addr: 2001:da8:2004:2009:2f0:cfff:fe81:f700/64 Scope:Global;;;inet6 addr: fe80::2f0:cfff:fe81:f700/64 Scope:Link;;;UP BROADCAST RUNNING MULTICAST; MTU:1500; Metric:1;;;RX packets:79280 errors:0 dropped:0 overruns:0 frame:0;;;TX packets:9418 errors:0 dropped:0 overruns:0 carrier:0;;;collisions:0 txqueuelen:1000;;;RX bytes:14814054 (14.1 MiB); TX bytes:1465054 (1.3 MiB);;;Interrupt:16 Base address:0xc000
lo;;;;;Link encap:Local Loopback;;;inet addr:127.0.0.1; Mask:255.0.0.0;;;inet6 addr: ::1/128 Scope:Host;;;UP LOOPBACK RUNNING; MTU:16436; Metric:1;;;RX packets:875 errors:0 dropped:0 overruns:0 frame:0;;;TX packets:875 errors:0 dropped:0 overruns:0 carrier:0;;;collisions:0 txqueuelen:0;;;RX bytes:132997 (129.8 KiB); TX bytes:132997 (129.8 KiB)
ppp0;;;Link encap:Point-to-Point Protocol;;;inet addr:10.55.0.37; P-t-P:10.10.88.48; Mask:255.255.255.255;;;UP POINTOPOINT RUNNING NOARP MULTICAST; MTU:1500; Metric:1;;;RX packets:7 errors:0 dropped:0 overruns:0 frame:0;;;TX packets:10 errors:0 dropped:0 overruns:0 carrier:0;;;collisions:0 txqueuelen:3;;;RX bytes:208 (208.0 b); TX bytes:315 (315.0 b)
$ ping g.cn;PING g.cn (203.208.35.100) 56(84) bytes of data.;64 bytes from bj-in-f100.google.com (203.208.35.100): icmp_seq=1 ttl=244 time=935 ms;64 bytes from bj-in-f100.google.com (203.208.35.100): icmp_seq=2 ttl=244 time=797 ms;64 bytes from bj-in-f100.google.com (203.208.35.100): icmp_seq=3 ttl=244 time=838 ms;64 bytes from bj-in-f100.google.com (203.208.35.100): icmp_seq=4 ttl=244 time=777 ms;64 bytes from bj-in-f100.google.com (203.208.35.100): icmp_seq=5 ttl=244 time=817 ms;^C;--- g.cn ping statistics ---;6 packets transmitted, 5 received, 16% packet loss, time 6602ms;rtt min/avg/max/mdev = 777.885/833.525/935.830/55.015 ms;$;
