SelectDB的专栏

1、root用户下执行命令：visudo2、添加一行：hadoop  ALL=(ALL)       NOPASSWD:ALL保存即可

[root@masternode ~]# sudo -u hdfs hdfs dfsadmin -safemode leaveSafe mode is OFF 上述命令可能会报：Error: JAVA_HOME is not set and could not be found.解决办法：[hadoop@masternode ~]$ sudo -i[root@mastern...