临时更改ip地址，重启后无效。
ifconfig eth0 192.168.4.7
IP:
子网掩码: 255.255.255.0
默认网关:
DNS:
更改生效网络
service network restart
traceroute某个网站的网络路径。
css@csc:~/test$ traceroute
traceroute to (202.108.33.60), 30 hops max, 60 byte packets
1 * * *
2 localhost (192.168.100.253) 0.569 ms 0.576 ms 0.706 ms
3 124.65.133.153 (124.65.133.153) 2.025 ms 2.256 ms 2.437 ms
4 124.65.236.249 (124.65.236.249) 2.046 ms 2.747 ms 3.747 ms
5 61.51.113.89 (61.51.113.89) 5.137 ms 5.243 ms 5.069 ms
6 61.51.112.33 (61.51.112.33) 3.669 ms 61.51.112.45 (61.51.112.45) 4.337 ms 124.65.56.117 (124.65.56.117) 5.321 ms
7 61.148.143.22 (61.148.143.22) 1.680 ms 61.148.143.26 (61.148.143.26) 17.453 ms 61.148.143.22 (61.148.143.22) 1.553 ms
8 210.74.176.138 (210.74.176.138) 1.906 ms 1.812 ms 1.974 ms
9 202.108.33.53 (202.108.33.53) 1.633 ms 1.520 ms 1.664 ms
10 * * *
11 * * *
12 * * *
13 * * *
14 * * 202.108.33.53 (202.108.33.53) 1.775 ms !H
netstat 查看网络,
-t tcp
-u udp
-l 监听
-r 路由
-n 显示IP地址
netstat -tlun 本机监听的端口
netstat -an 本机所有的网络链接
netstat -rn 本机路由表
Apache端口是80， 没有显示表示没有没有Apache。
css@csc:~/test$ netstat -tlun
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
tcp 0 0 127.0.1.1:53 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp6 0 0 ::1:631 :::* LISTEN
tcp6 0 0 :::22 :::* LISTEN
udp 0 0 0.0.0.0:631 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 127.0.1.1:53 0.0.0.0:*
查看网关-rn。
css@csc:~/test$ netstat -rn
内核 IP 路由表
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.4.254 0.0.0.0 UG 0 0 0 eth0
192.168.4.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
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