#! /bin/sh  
PRO_NAME=./xxxx.sh 

while true ; do  
     #用ps獲取$PRO_NAME進程數量  
     echo ‘‘> nohup.out
     NUM=`ps aux | grep -w ${PRO_NAME} | grep -v grep |wc -l`  
     #echo $NUM  
     #少於1，重啟進程  
     if [ "${NUM}" -lt "1" ];then  
         echo "${PRO_NAME} was killed"  
         ${PRO_NAME} -d  
    #大於1，殺掉所有進程，重啟  
    elif [ "${NUM}" -gt "1" ];then  
        echo "more than 1 ${PRO_NAME},killall ${PRO_NAME}"  
         killall -9 $PRO_NAME  
        ${PRO_NAME} -d  
     fi  
     #kill僵屍進程  
     NUM_STAT=`ps aux | grep -w ${PRO_NAME} | grep T | grep -v grep | wc -l`  
     if [ "${NUM_STAT}" -gt "0" ];then  
         killall -9 ${PRO_NAME}  
         ${PRO_NAME} -d  
    fi  
     sleep 5s  
 done  

 exit 0
 

建立一個重啟DB的腳本（僅限rac使用),純粹為方便：

#!/bin/bash
if [ $1 ]
then
{
db_name=$1
srvctl stop database -d $db_name -o abort
num=`ps -ef|grep -i smon_|grep -v grep|grep -v -i asm|awk ‘{print $2}‘ `
if [ ! $num ]
then
echo "database restart........."
fi
while [ "$num" ]
do
sleep 1
num=`ps -ef|grep -i smon_|grep -v grep|grep -v -i asm |awk ‘{ print $2  }‘`
echo "database not shutdown ,please check!" 
done
srvctl start database -d $1

num=`ps -ef|grep -i smon_|grep -v grep|grep -v -i asm |awk ‘{ print $2 } ‘`
if [ $num ]
then
echo "database starting "
fi
if [ ! -n "$num" ]
then
echo "start fail"
else
echo  "start sucessfully"
fi
}
else
echo "No parameter ,eg: ./stop_db.sh dbname"
fi
 

linux shell守護進程/ rac重啟腳本