How to check the port occupation process number and program name under Linux

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Check the port occupancy under linux:

1. See which process occupies port 819:

Case9-sghfofo:/usr/local/cnbj/tomcat-bj/bin # lsof-iRu 859

The result after running:

Command pid user fd type device size node name

Java 24907 root 31U ipv4 248905027 tcp *: 859 (listen)

From the above we know that port 859 is occupied by a process with process number 24907, which is a java process.

two。 See where the process with process number 24907 is:

Case9-sghfofo:/usr/local/cnbj/tomcat-bj/bin # ps-ef | grep 24907

Root 13421 29276 0 20:08 pts/2 00:00:00 grep 24907

Root 24907 10 11:43 pts/4 00:03:53 / usr/java/jdk1.6.0_13/bin/java-server-xx:permsize=256m-xx:maxpermsize=512m-xbootclasspath/p:java-net-socket.jar-djava.util.logging.manager=org.apache.juli.classloaderlogmanager-djava.util.logging.config.file=/usr/local/cnsh/tomcat-sh/conf/logging.properties-djava.endorsed.dirs=/usr/local/cnsh/tomcat-sh/bin/endorsed-classpath: / usr/local / cnsh/tomcat-sh/bin/bootstrap.jar-dcatalina.base=/usr/local/cnsh/tomcat-sh/bin-dcatalina.home=/usr/local/cnsh/tomcat-sh/bin-djava.io.tmpdir=/usr/local/cnsh/tomcat-sh/bin/temp-xmx512m-xms256m org.apache.catalina.startup.bootstrap start

From the above, we know that the tomcat with the directory / usr/local/cnsh/tomcat-sh/bin/ is occupied.

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