In Linux, check what programs are running under a port.

In Linux, check the program running under a port-Linux Enterprise Application-Linux server application information. The following is a detailed description. 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)

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