写了个启动jar包的脚本，但是却提示command not found，求教

[datasync@localhost ~]$ vi start.sh#!/bin/sh
echo "你好"
start(){
java -Xms128m -Xmx2048m -jar Sandlogprocesser.jar >logg.log&
tail -f result.log
}stop(){
ps -ef|grep Sandlogprocesser|while read pid
do
  kill -9 $pid
done
}case "$1" in
start)
  start;;
stop)
  stop;;
restart)
  stop
  start;;
*)
printf 'Usage:%s {start|stop|restart}\n' "$prog"
exit 1
;;
esac