1.美图
![在这里插入图片描述](https://img-blog.csdnimg.cn/20191202111542767.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxMzgzNDM1,size_16,color_FFFFFF,t_70)
2.背景
启动hadoop
(base) lcc@lcc hadoop-2.7.4$ sh sbin/start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
19/12/02 11:00:58 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [localhost]
localhost: starting namenode, logging to /Users/lcc/soft/hadoop/hadoop-2.7.4/logs/hadoop-lcc-namenode-lcc.out
启动