centos 运维 jar 包脚本-526互联

新建sh 文件

#!/bin/bash

# Define variables
JAR_FILE="your-application.jar"
JAVA_OPTS="-Xmx512m -Xms256m"
PID_FILE="pid.txt"

# Function to check if the application is running
is_running() {
    [ -f "$PID_FILE" ] && ps -p "$(cat "$PID_FILE")" &> /dev/null
}

# Function to start the application
start() {
    if is_running; then
        echo "Application is already running."
    else
        nohup java $JAVA_OPTS -jar "$JAR_FILE" > /dev/null 2>&1 &
        echo $! > "$PID_FILE"
        echo "Application started."
    fi
}

# Function to stop the application
stop() {
    if is_running; then
        kill "$(cat "$PID_FILE")"
        rm "$PID_FILE"
        echo "Application stopped."
    else
        echo "Application is not running."
    fi
}

# Function to restart the application
restart() {
    stop
    start
}

# Main script logic
case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        restart
        ;;
    status)
        if is_running; then
            echo "Application is running."
        else
            echo "Application is not running."
        fi
        ;;
    *)
        echo "Usage: $0 {start|stop|restart|status}"
        exit 1
        ;;
esac

exit 0

启动 sh xxx.sh start
关闭 sh xxx.sh stop
重启sh xxx.sh restart
如果报类似于下面的错

com.sh: line 3: $'\r': command not found
com.sh: line 6: $'\r': command not found
com.sh: line 9: $'\r': command not found
com.sh: line 11: syntax error near unexpected token `$'{\r''
'om.sh: line 11: `stop() {

表明脚本具有 Windows 样式的行结尾（CRLF、回车 + 换行），类 Unix 系统无法正确识别它们。

要解决此问题，您可以使用文本编辑器或命令行工具将行结尾转换为 Unix 样式（LF、换行）。有几种方法可以做到这一点：

使用dos2unix：

sudo yum install dos2unix
dos2unix xxx.sh

然后再运行就行了