在Linux中，我们可以使用service启动，停止和重新启动服务。
例如：

$sudo service mysql stop
$sudo service mysql start
$sudo service mysql restart

如果是一些自己开发的软件，或者从源代码安装的。

我们可以使用Bash脚本来自定义一个服务进程控制器。

我们使用“nohup”来启动守护进程程序并将其放到后台运行。
将进程ID输出到$PID_FILE_PATH，以便我们稍后可以停止控制。
如果找到PID_FILE_PATH，则使用“PS”命令在内存中搜索进程，如果找到进程运行，则退出BASH。

#!/bin/bash
# Function: to start, stop and restart the application.
# Usage: 
$./runner.sh stop yes
cat: runner.pid: No such file or directory
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
Failed to stop yes.
$./runner.sh start yes
Succeeded to start yes.
nohup: appending output to 'nohup.out'
$./runner.sh restart yes
Succeeded to stop yes.
Succeeded to start yes.
nohup: appending output to 'nohup.out'
$./runner.sh stop yes
Succeeded to stop yes.
 start|stop|restart application
if [[ "$#" -lt 2 ]]; then
    echo "Usage: ##代码## start|stop|restart command"
    echo "$# parameters given."
    exit 1
fi
PID_FILE_PATH="runner.pid"
case "" in
    start)
        # Already running
        if [ -f ${PID_FILE_PATH} ]; then
            pid=$(cat ${PID_FILE_PATH})
            if $(ps -p ${pid} > /dev/null); then
                echo "Already running [PID: ${pid}], you can stop it and retry."
                exit 1
            fi
        fi
        nohup "" 2>&1 \
            & echo $! > ${PID_FILE_PATH}
        if [ $? -eq 0 ]; then
            echo "Succeeded to start ."
        else
            echo "Failed to start ."
            exit 1
        fi
    ;;
    stop)
        kill $(cat ${PID_FILE_PATH})
        if [ $? -eq 0 ]; then
            rm ${PID_FILE_PATH}
            echo "Succeeded to stop ."
        else
            echo "Failed to stop ."
            exit 1
        fi
    ;;
    restart)
        ##代码## stop "" && sleep 1 && ##代码## start ""
    ;;
esac

例子：