View port usage status and start in Linux

LINUX network performance management tool sanjianke this article describes how to manage Linux to view the output information of the port. This command will display the outgoing headers from each packet and the address of port 80 from the host hostname.
The Netstat-tln command is used to view port usage in Linux.

/Etc/init. d/vsftp start is used to start the ftp port ~!

View files/etc/services

Netstat

View the connected service port ESTABLISHED in Linux)

Netstat-

View All service ports LISTEN and ESTABLISHED in Linux)

Sudo netstat-ap

In Linux, you can view all service ports and display the corresponding service program name.

Nmap <scan type> <scan parameters>

For example:

Nmap localhost

Nmap-p 1024-65535 localhost

Nmap-PT 192.168.1.127-245

When we use netstat-apn to view network connections, we will find a lot similar to the following:

Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

Tcp 0 52 218.104.81.152: 7710 211.100.39.250: 29488 ESTABLISHED 6111/1

It indicates that port 7710 is opened on this server. Which program does this port belong? We can use the lsof-I: 7710 command to query:

COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME

Sshd 1990 root 3u IPv4 4836 TCP *: 7710 LISTEN) Network Management Alliance bitsCN @ com

In this way, we know that port 7710 belongs to the sshd program.

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2. Development and Application of linux Network Monitoring System
3. How to share Linux traffic monitoring
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