mkdir: Cannot create directory /file. Name node is in safe mode.
刚刚在hadoop想创建一个目录的时候，发现报错了
具体信息如下：
[hadoop@mini1 hadoop-2.6.4]$ hadoop fs -mkdir /file
mkdir: Cannot create directory /file. Name node is in safe mode.从错误信息可以看到hadoop当前的namenode是处于安全模式。
解决：
[hadoop@mini1 hadoop-2.6.4]$ hadoop dfsadmin -safemode leave
DEPRECATED: Use of this script to execute hdfs command is deprecated.
Instead use the hdfs command for it.
Safe mode is OFF再次执行创建目录的的命令，成功
