How can I start a Java process and retain its process id?

$JAVA_HOME/bin/java" -classpath "$NEW_CLASSPATH" myclassfile &  echo $! > /tmp/java.pid 

You can then write a kill script:

#!/bin/sh PIDFILE=/tmp/java.pid  
echo 'Killing Java process from PID file'  
if [ -f $PIDFILE ] ; then   
  PID=`cat $PIDFILE`   
  kill -3 $PID    
  if kill -9 $PID ; then     
    echo "java process stopped"   
  else     
    echo "java process could not be stopped"   
   fi    
   rm -f $PIDFILE
fi 

tags: java  process  linux  

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