[Reprint] netstat command netstat command summary summary

netstat command summary

 

https://www.cnblogs.com/chenqionghe/p/10654109.html

 

nestat Introduction

netstat is a command-line tool can be used on all of the listed network socket connection system, comprising tcp, udp and unix socket, while it also listed in the listening state (i.e., waiting for access requests) socket.

Use Parameter Description

And routing related parameters

-r : 列出路由表，功能如route命令
-n : 不使用主机名与服务名称，使用ip与port number,如同route -n

Network interface-related parameters

-a : 列出所有的连接状态，包括tcp/udp/unix socket等
-t : 仅列出tcp数据包的连接
-u : 仅列出udp数据包的连接
-l : 仅列出已在listen(监听)的服务的网络状态 -p : 列出pid进程号与program文件名 -i : 打印网络接口 -g : 显示IPv4和IPv6的多播组信 -c : 可以设置几秒后自动更新一次，例如-c 5为每5s更新一次网络状态 -s : 显示网络统计数据 -e : 显示更多的信息(如用户ID、网卡IP等)

Examples of Use

Table 1 lists the current routing state, ip and port number to show:

netstat -rn

2. List all current network connections, the port number is displayed in ip

netstat -an

3. Display Network service has been launched

netstat -tulnp

4. See all the machine network connection status

netstat -atunp

5. Print statistics

netstat -s

6. Print a network interface

netstat -i

Print a little more detail, similar to ifconfig

netstat -ie

7. continuously monitoring

netstat -ct

The display the multicast group information

-G option will output the multicast group information of IPv4 and IPv6

netstat -g

The printing of the active state is connected

Active state is connected to the socket "ESTABLISHED" field indicates the connection state of the active print

netstat -atnp | grep ESTA

Monitoring active connections with the watch command state:

watch -d -n0 "netstat -atnp | grep ESTA"

10. Review the service is running

http, smtp or ntp service is running, use grep.

netstat -aple | grep http

 

Category:  Linux

nestat Introduction

netstat is a command-line tool can be used on all of the listed network socket connection system, comprising tcp, udp and unix socket, while it also listed in the listening state (i.e., waiting for access requests) socket.

Use Parameter Description

And routing related parameters

-r : 列出路由表，功能如route命令
-n : 不使用主机名与服务名称，使用ip与port number,如同route -n

Network interface-related parameters

-a : 列出所有的连接状态，包括tcp/udp/unix socket等
-t : 仅列出tcp数据包的连接
-u : 仅列出udp数据包的连接
-l : 仅列出已在listen(监听)的服务的网络状态 -p : 列出pid进程号与program文件名 -i : 打印网络接口 -g : 显示IPv4和IPv6的多播组信 -c : 可以设置几秒后自动更新一次，例如-c 5为每5s更新一次网络状态 -s : 显示网络统计数据 -e : 显示更多的信息(如用户ID、网卡IP等)

Examples of Use

Table 1 lists the current routing state, ip and port number to show:

netstat -rn

2. List all current network connections, the port number is displayed in ip

netstat -an

3. Display Network service has been launched

netstat -tulnp

4. See all the machine network connection status

netstat -atunp

5. Print statistics

netstat -s

6. Print a network interface

netstat -i

Print a little more detail, similar to ifconfig

netstat -ie

7. continuously monitoring

netstat -ct

The display the multicast group information

-G option will output the multicast group information of IPv4 and IPv6

netstat -g

The printing of the active state is connected

Active state is connected to the socket "ESTABLISHED" field indicates the connection state of the active print

netstat -atnp | grep ESTA

Monitoring active connections with the watch command state:

watch -d -n0 "netstat -atnp | grep ESTA"

10. Review the service is running

http, smtp or ntp service is running, use grep.

netstat -aple | grep http