在個人板子上ping路由上的IP的時候能夠ping通,可是ping外網的IP的時候提示「ping: sendto: Network is unreachable」linux
後來使用route命令看了一下網絡
# route.net
Kernel IP routing tablehtm
Destination Gateway Genmask Flags Metric Ref Use Ifaceblog
192.168.1.0 * 255.255.255.0 U 0 0 0 rausb0路由
發現網關(Gateway),是空着的沒有設置,因而執行一下命令設置了網關:get
# route add default gw 192.168.1.1it
# routeio
Kernel IP routing tabletable
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 rausb0
default 192.168.1.1 0.0.0.0 UG 0 0 0 rausb0
最後終於能夠ping通外網了
# ping 119.75.217.56
PING 119.75.217.56 (119.75.217.56): 56 data bytes
64 bytes from 119.75.217.56: seq=0 ttl=52 time=38.349 ms
64 bytes from 119.75.217.56: seq=1 ttl=52 time=30.369 ms
64 bytes from 119.75.217.56: seq=2 ttl=52 time=30.541 ms
64 bytes from 119.75.217.56: seq=3 ttl=52 time=29.659 ms
64 bytes from 119.75.217.56: seq=4 ttl=52 time=29.786 ms
另外若是網絡的其餘信息沒有設置好,也會出現這樣的狀況,能夠參考以下設置(http://www.lslnet.com/linux/f/docs1/i57/big5378732.htm)
ifconfig lo 127.0.0.1
route add -net 127.0.0.0 netmask 255.255.255.0 lo
ifconfig eth0 192.168.10.0
route add -net 192.168.10.0 netmask 255.255.255.0
轉自:http://blog.csdn.net/qingtingchen1987/article/details/7045068