hadoop启动后jps命令后未找到NameNode服务

  如题，按照官方文档启动部署hadoop， https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/SingleCluster.html 或 https://www.cnblogs.com/hello-/articles/9600269.html 但是在执行‘ $ sbin/start-dfs.sh’命令进行

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