Linux网络命令

1、ping 命令

使用命令：ping [-c 次数]网址或者IP地址。可以查看当前客户端与IP的网络是否可达。

ping -c 5 www.baidu.com
PING www.a.shifen.com (157.148.69.74) 56(84) bytes of data.
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=1 ttl=52 time=3.69 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=2 ttl=52 time=3.57 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=3 ttl=52 time=3.57 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=4 ttl=52 time=3.61 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=5 ttl=52 time=3.62 ms--- www.a.shifen.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4005ms
rtt min/avg/max/mdev = 3.570/3.612/3.689/0.043 ms

-c选项也可以省略：

ping www.baidu.com
PING www.a.shifen.com (157.148.69.74) 56(84) bytes of data.
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=1 ttl=52 time=3.48 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=2 ttl=52 time=3.47 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=3 ttl=52 time=3.71 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=4 ttl=52 time=3.52 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=5 ttl=52 time=3.58 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=6 ttl=52 time=3.63 ms
64 bytes from 157.148.69.74 (157.148.69.74): icmp_seq=7 ttl=52 time=4.07 ms
^C
--- www.a.shifen.com ping statistics ---
7 packets transmitted, 7 received, 0% packet loss, time 6009ms
rtt min/avg/max/mdev = 3.468/3.635/4.074/0.195 ms

如果显示0 received, 100% packet loss，说明目标IP网络不可达。

ping 192.168.3.12
PING 192.168.3.12 (192.168.3.12) 56(84) bytes of data.
^C
--- 192.168.3.12 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3064ms

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2、netstat命令

使用命令：netstat [选项]，可以查看网络状态。

常用选项：

• -n 拒绝显示别名，能显示数字的全部转化成数字

• -l 仅列出有在 Listen (监听) 的服务状态

• -p 显示建立相关链接的程序名

• -t (tcp)仅显示 tcp 相关选项

• -u (udp)仅显示 udp 相关选项

• -a (all)显示所有选项，默认不显示 Listen 相关

还可以使用watch命令每隔一段时间查看一次网络状态：

//每个 1s 执行一次 netstat -npua
xp2@VM-8-12-ubuntu:~/Linux_Advance/day_01/demo_01/udp_server_echo$ watch -n 1 netstat -npua

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3、pidof

使用命令：pidod 进程名，通过进程名查看进程pid。

xp2@VM-8-12-ubuntu:~/Linux_Advance/day_01/demo_01/udp_server_echo$ pidof udp_server 
222863

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OKOK，Linux网络命令就到这里，如果你对Linux和C++也感兴趣的话，可以看看我的主页哦。下面是我的github主页，里面记录了我的学习代码和leetcode的一些题的题解，有兴趣的可以看看。

Xpccccc的github主页