ubuntu网络连接问题

[huszhi]

Ubuntu10.04
用ifconfig查看，得到下面的内容，但是无法上网，
请问咋搞定啊？？？？？？？？？
ubuntu@ubuntu-laptop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:22:b3:6d:c8:70
inet addr:172.19.140.141 Bcast:172.19.141.255 Mask:255.255.254.0
inet6 addr: fe80::225:b3ff:fe6d:c871/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1221 errors:0 dropped:0 overruns:0 frame:0
TX packets:31 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:77298 (77.2 KB) TX bytes:4501 (4.5 KB)
Interrupt:17

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:17 errors:0 dropped:0 overruns:0 frame:0
TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1124 (1.1 KB) TX bytes:1124 (1.1 KB)

wlan0 Link encap:Ethernet HWaddr 00:1e:65:0d:77:34
UP BROADCAST 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:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

[huszhi]

？