How to monitor a process and restart it when failed in Linux?

 

1. Write a Monitor.sh file as below

#! /bin/sh    
    
proc_name="Process_Name"        #进程名  
    
proc_num()                      #查询进程数量  
{  
    num=`ps -ef | grep $proc_name | grep -v grep | wc -l`  
    return $num  
}  
  
proc_num    
number=$?                       #获取进程数量  
if [ $number -eq 0 ]            #如果进程数量为0  
//or you can remove the number and write as this
//if [ $? == 0 ]
then                            #重新启动服务器，或者扩展其它内容。  
    cd /your/service/path; ./Process_Name.sh  
fi    

 

2. Create a cron job

$> crontab -e

*/1 * * * * sh /root/monitor.sh

3. Start and Check the cron status

service crond start
service crond status