View port usage in Linux

In Linux, check port usage and check which program occupies port 3306 [root @ DB13 ~] # Lsof-I: 3306 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME mysqld 6153 mysql 10u IPv4 13751 TCP *: mysql (LISTEN) mysqld 6153 mysql 111u IPv4 13816917 TCP 10.1.1.13: mysql-> apache2: 4832 (ESTABLISHED) mysqld 6153 mysql 161u IPv4 13816822 TCP 10.1.1.13: mysql-> apache2: 4620 (ESTABLISHED) mysqld 6153 mysql 228u IPv4 13817771 TCP 10.1.1.13: mysq: check which service on port 3306 uses www.2cto.com [root @ DB13 ~] # Netstat-tunlp | grep: 3306 tcp 0 0 0.0.0.0: 3306 0.0.0.0: * LISTEN 6153/mysqld [root @ DB13 ~] # Check whether port 3306 is in use. You can verify that the service using this port is running properly. [root @ DB13 ~] # Netstat-an | grep: 3306 tcp 0 0 0.0.0.0: 3306 0.0.0.0: * LISTEN tcp 0 0 10.1.1.13: 3306 10.1.1.7: 9486 TIME_WAIT tcp 0 0 10.1.1.13: 3306 10.1.1.7: 8459 TIME_WAIT tcp 0 0 10.1.1.13: 3306 10.1.1.7: 9510 TIME_WAIT tcp 0 0 10.1.1.13: 3306 10.1.1.7: 7968 TIME_WAIT tcp 0 0 10.1.1.13: 3306 10.1.1.7: 8773 TIME_WAIT tcp 0 0 10.1.1.13: 3306 10.1.1.7: 10817 TIME_WAIT tcp 0 293 10.1.1.13: 3306 10.1.1.7: 11103 ESTABLISHED tcp 0 0 10.1.1.13: 3306 10.1.1.7: 9561 TIME_WAIT tcp 0 52 10.1.1.13: 3306 10.1.1.7: 11104 ESTABLISHED tcp 0 10.1.1.13: 3306 10.1.1.7: 9568 TIME_WAIT