题目7单选题
采用用户user1安装hadoop伪分布式时,解压hadoop安装包采用下面命令:sudo tar -zxvf hadoop-2.7.3.tar.gz -C ~运行ls -al命令显示drwxr-xr-x 11 root root 4096 Aug 3 01:06 hadoop-2.7.3如果要修改hadoop-2.7.3目录的权限,采用下面哪个命令才有效而且最佳?( )A. chown user1:user1 hadoop-2.7.3B. chown -R user1:user1 hadoop-2.7.3C. sudo chmod -R 777 hadoop-2.7.3D. sudo chown -R user1:user1 hadoop-2.7.3