1、首先根据名称用ps命令查看进程ID：
ps -ef | grep zookeeper
jim 10997 1959 0 12月14 pts/2 00:00:01 /usr/lib/jvm/java-8-oracle/bin/java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,CONSOLE -cp /home/jim/opt/zookeeper-3.4.9/bin/../build/classes:/home/jim/opt/zookeeper-3.4.9/bin/../build/lib/*.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/slf4j-api-1.6.1.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/netty-3.10.5.Final.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/log4j-1.2.16.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/jline-0.9.94.jar:/home/jim/opt/zookeeper-3.4.9/bin/../zookeeper-3.4.9.jar:/home/jim/opt/zookeeper-3.4.9/bin/../src/java/lib/*.jar:/home/jim/opt/zookeeper-3.4.9/bin/../conf: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain /home/jim/opt/zookeeper-3.4.9/bin/../conf/zoo.cfg
10997为进程ID
后面是启动路径和对应的进程名
1.1、对于在Java虚拟机中运行的进程，比如tomcat的守护进程，可以直接用jsp命令查看：
jps -l | grep zookeeper
10997 org.apache.zookeeper.server.quorum.QuorumPeerMain
已经知道进程的确切名称，可以用pidof查看：
pidof Name
不过这个一般少用，因为真的很难查
2、查到进程ID之后，使用netstat命令查看其占用的端口：
netstat -anp | grep 10997
tcp6 0 0 :::43125 :::* LISTEN 10997/java tcp6 0 0 :::2181 :::* LISTEN 10997/java
红色的为占用的端口，LISTEN为占用的类型，绿色粗体为进程ID