【Java命令三】jps

jps很简单，用于显示当前运行的Java进程，也可以连接到远程服务器去查看

[hadoop@hadoop bin]$ jps -help
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>:      <hostname>[:<port>]

用法举例：

1. jps

[hadoop@hadoop bin]$ jps
3489 Jps
1819 Master
1988 Worker

  

2. jps -v

忽略了jps本身这个Java进程

[hadoop@hadoop bin]$ jps -v
3524 Jps -Dapplication.home=/home/hadoop/software/jdk1.7.0_67 -Xms8m
1819 Master -XX:MaxPermSize=128m -Dspark.akka.logLifecycleEvents=true -Xms512m -Xmx512m
1988 Worker -XX:MaxPermSize=128m -Dspark.akka.logLifecycleEvents=true -Xms512m -Xmx512m

3. jps -m

[hadoop@hadoop bin]$ jps -m
1819 Master --ip hadoop.master --port 7077 --webui-port 8080
1988 Worker spark://hadoop.master:7077
3549 Jps -m

4. jps -l

可以显示详细的类名，而jps默认显示的是simple class name

[hadoop@hadoop bin]$ jps -l
1819 org.apache.spark.deploy.master.Master
1988 org.apache.spark.deploy.worker.Worker
3563 sun.tools.jps.Jps

5. jps -lmv

[hadoop@hadoop bin]$ jps -lmv
3575 sun.tools.jps.Jps -lmv -Dapplication.home=/home/hadoop/software/jdk1.7.0_67 -Xms8m
1819 org.apache.spark.deploy.master.Master --ip hadoop.master --port 7077 --webui-port 8080 -XX:MaxPermSize=128m -Dspark.akka.logLifecycleEvents=true -Xms512m -Xmx512m
1988 org.apache.spark.deploy.worker.Worker spark://hadoop.master:7077 -XX:MaxPermSize=128m -Dspark.akka.logLifecycleEvents=true -Xms512m -Xmx512m