linux下ping命令出現ping: sendto: Network is unreachable

問題：ping外網出現:

　　　　 sendto: Network is unreachable

 

查看：

　　　　#route

　　　　Route命令 : 在數據包沒有有效傳遞的狀況下，能夠利用route命令查看路由表

[root@tiny4412:/]#route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     0      0        0 eth0

　　　　發現，是因爲網關，沒有配置網關（gateway）

 

解決：

　　　

[root@tiny4412:/]#route add default gw 192.168.1.1
[root@tiny4412:/]#route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
192.168.1.0     *               255.255.255.0   U     0      0        0 eth0

 

測試：

[root@tiny4412:/]#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=50 time=20.468 ms
64 bytes from 119.75.217.56: seq=1 ttl=50 time=19.113 ms
64 bytes from 119.75.217.56: seq=2 ttl=50 time=18.814 ms
64 bytes from 119.75.217.56: seq=3 ttl=50 time=18.906 ms
64 bytes from 119.75.217.56: seq=4 ttl=50 time=18.859 ms
64 bytes from 119.75.217.56: seq=5 ttl=50 time=18.704 ms
64 bytes from 119.75.217.56: seq=6 ttl=50 time=19.050 ms
64 bytes from 119.75.217.56: seq=7 ttl=50 time=20.514 ms
64 bytes from 119.75.217.56: seq=8 ttl=50 time=21.355 ms
^C
--- 119.75.217.56 ping statistics ---
9 packets transmitted, 9 packets received, 0% packet loss
round-trip min/avg/max = 18.704/19.531/21.355 ms