systemctl stop firewalld
//關閉防火牆。html
查看防火牆狀態
firewall-cmd --stateoop
中止firewall
systemctl stop firewalld.servicespa
禁止firewall開機啓動
systemctl disable firewalld.service htm
//hadoop 集羣
http://master:8088/clusterhadoop
hdfs 文件查看
http://master:50070/explorer.html#/get
查看 spark 運行狀態
http://master:8080/cmd