linux查看端口被占用情况

１．Fedora20系统下启动一个jetty服务器．端口８０８０；

２．执行命令，会显示如下：

[doctor@localhost bin]$ lsof -i:8080
COMMAND   PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
java    10033 doctor  180u  IPv6 253547      0t0  TCP *:webcache (LISTEN)
[doctor@localhost bin]$ 

得到ＰＩＤ　10033.

３．执行命令：

[doctor@localhost ~]$ ps aux |grep 10033
doctor   10033  1.7 12.4 6044780 979184 pts/1  Sl   11:07   0:34 /home/doctor/opt/jdk1.8.0_25/bin/java -Djetty.home=/home/doctor/opt/jetty9-jenkins -Djetty.base=/home/doctor/opt/jetty9-jenkins -Djava.io.tmpdir=/tmp -jar /home/doctor/opt/jetty9-jenkins/start.jar jetty-started.xml
doctor   10874  0.0  0.0 112696  2300 pts/1    S+   11:41   0:00 grep --color=auto 10033
[doctor@localhost ~]$ 

或者

[doctor@localhost ~]$ ps u 10033 |cat
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
doctor   10033  1.5 12.4 6044780 979184 pts/1  Sl   11:07   0:34 /home/doctor/opt/jdk1.8.0_25/bin/java -Djetty.home=/home/doctor/opt/jetty9-jenkins -Djetty.base=/home/doctor/opt/jetty9-jenkins -Djava.io.tmpdir=/tmp -jar /home/doctor/opt/jetty9-jenkins/start.jar jetty-started.xml
[doctor@localhost ~]$ 

后面的cat显示主要是为了换行，这样信息显示的全．