SHELL script implements service downtime monitoring and automatic restart

You need to install yum install stat crontabs first (this example is under centos system)
#!/bin/bash
#Shell
##Monitor according to the modified file time##
c -l /tmp/log.txt | awk '{ print $5 }'` //Get the file size
filetime=`stat /tmp/q | tail -1 | awk '{print $2,$3}'` //Get the file update time
test=`cat /tmp/log. txt`                                                                                                // View the file content
if [ $content == "0" ]; then​
elif [ "$filetime" == "$ test "]; then // If the file is not modified, then execute
kill nginx
/Home/nginx_server/nginx/sbin/nginx
else // tmp/log.txt
fi

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The above has introduced the SHELL script to implement automatic restart of service downtime monitoring, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.