具体代码

用法
切换普通用户后在目录创建my_hadoop.sh,添加内容

#!/bin/bash
if [ $# -lt 1 ]
then
    echo "No Args Input..."
    exit ;
fi
case $1 in
"start")
        echo " =================== 启动 hadoop集群 ==================="

        echo " --------------- 启动 hdfs ---------------"
        ssh hadoop21 "/opt/module/hadoop-3.1.3/sbin/start-dfs.sh"
        echo " --------------- 启动 yarn ---------------"
        ssh hadoop22 "/opt/module/hadoop-3.1.3/sbin/start-yarn.sh"
        echo " --------------- 启动 历史服务器 ---------------"
        ssh hadoop11 "mapred --daemon start historyserver"

;;
"stop")
        echo " =================== 关闭 hadoop集群 ==================="

        echo " --------------- 关闭 yarn ---------------"
        ssh hadoop22 "/opt/module/hadoop-3.1.3/sbin/stop-yarn.sh"
        echo " --------------- 关闭 hdfs ---------------"
        ssh hadoop21 "/opt/module/hadoop-3.1.3/sbin/stop-dfs.sh"
        echo " --------------- 停止 历史服务器 ---------------"
        ssh hadoop11 "mapred --daemon stop historyserver"
;;
"restart")
        echo " =================== 重启 hadoop集群 ==================="

        echo " --------------- 关闭 yarn ---------------"
        ssh hadoop22 "/opt/module/hadoop-3.1.3/sbin/stop-yarn.sh"
        echo " --------------- 关闭 hdfs ---------------"
        ssh hadoop21 "/opt/module/hadoop-3.1.3/sbin/stop-dfs.sh"
        echo " --------------- 停止 历史服务器 ---------------"
        ssh hadoop11 "mapred --daemon stop historyserver"

        echo " --------------- 启动 hdfs ---------------"
        ssh hadoop21 "/opt/module/hadoop-3.1.3/sbin/start-dfs.sh"
        echo " --------------- 启动 yarn ---------------"
        ssh hadoop22 "/opt/module/hadoop-3.1.3/sbin/start-yarn.sh"
        echo " --------------- 启动 历史服务器 ---------------"
        ssh hadoop21 "mapred --daemon start historyserver"

;;
*)
    echo "Input Args Error..."
;;
esac

添加权限

sudo chmod +x ~/bin/my_hadoop.sh

创建软连接

sudo ln -s ~/bin/my_hadoop.sh /bin/my_hadoop