Linux Daemon Shell Script __linux

http://blog.csdn.net/special23/article/details/52690057

Service-side programs generally need long-term background stable operation, in addition to ensuring the robustness of the program itself, but also need to use some daemons.

Now share a simple shell script in the way:

#! /bin/sh
#进程名字可修改
pro_name=rails
cmd= "nohup bundle exec Rails Server Webrick-p3000-b 0.0.0.0-e-production & Gt;/dev/null 2>&1-d & "While
true: do
     #用ps获取 $PRO number of _name processes
     num= ' ps aux | grep-w ${pro_name} | gre p-v grep |wc-l '
     #echo $NUM
     #少于1, restart process
     if ["${num}"-lt "1"];then
         echo "${pro_name} was killed"
         $CM D
    #大于1, kill all Processes, reboot
    elif ["${num}"-gt "1"];then
        echo "More than 1 ${pro_name},killall ${pro_name}"
        Killall-9 $PRO _name
        $CMD
     fi
     #kill僵尸进程
     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}
         $CMD
    fi sleep
     5s
done

Exit 0

Script Saved as xxx.sh

Set script execution permissions chmod 777 xxx.sh

Console execution:./xxx.sh This ensures that there is always a XXXX program running.

Need to keep running in the background: nohup ./xxx.sh &