In linux, how does one check who occupies the port?

In linux, how does one check who occupies the port?
Use netstat to view details!> Netstat-noap | grep 80 | grep tcp Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name limit tcp 74160 138880 127.0.0.1: 6150 127.0.0.1: 6150 ESTABLISHED 3145/tnslsnr unkn-4 (52.04/0/0) tcp 0: 8009: * LISTEN 31550/java off (0.00/0/0) tcp 0: 8080:: * LISTEN 31550/java off (0.00/0/0) tcp 0: 80: * LISTEN 24675/httpd off (0.00/0/0)


Use lsof for viewing!Who is using tcp8080 port lsof-I tcp: 8080 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME -------------------------------------------------- java 31550 root slave U IPv6 78687600 TCP *: webcache (LISTEN) who is using port 22 lsof-I: 22 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME sshd 2883 root 3u IPv6 7642 TCP *: ssh (LISTEN)


Then, according to the pid
Use ps-ef | grep pid to find out where it is occupied