我想要完成的任务很简单：配置我的 ubuntu 客户端，以便我可以通过 wifi 通过 openvpn 文件连接到互联网。
与 openvpn 服务器的连接已建立，之后sudo openvpn file.ovpn，我得到输出Initialization Sequence Completed
我无法 ping 通 google 但可以 ping 通 openvpn 服务器。
user@computer:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1b:b9:b2:bb:a9
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)
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:65536 Metric:1
RX packets:220 errors:0 dropped:0 overruns:0 frame:0
TX packets:220 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:16057 (16.0 KB) TX bytes:16057 (16.0 KB)
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.8.0.34 P-t-P:10.8.0.33 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:15 errors:0 dropped:0 overruns:0 frame:0
TX packets:75 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1191 (1.1 KB) TX bytes:4540 (4.5 KB)
wlan0 Link encap:Ethernet HWaddr 00:18:4d:70:68:26
inet addr:192.168.0.12 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::218:4dff:fe70:6826/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:148 errors:0 dropped:0 overruns:0 frame:0
TX packets:304 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:30520 (30.5 KB) TX bytes:47304 (47.3 KB)
Interrupt:21 Memory:ff5e0000-ff5f0000
user@computer:~$