【发布时间】:2014-06-05 00:12:51
【问题描述】:
我已设置 AWS EMR。我通过 SSH 连接到主节点。我想将文件复制到 hdfs 系统中。我的程序中执行此操作的那一小行代码是:
os.system('/home/hadoop/bin/hdfs dfs -put %s PATH_to_HADOOP' % tmp_output)
我想输入我的 hdfs 文件系统的路径。
我愿意
[ec2-user@ip-172-31-0-185 input]$ /home/hadoop/bin/hdfs dfs -ls /
Found 2 items
drwxr-xr-x - hadoop supergroup 0 2014-04-14 22:21 /hbase
drwxrwx--- - hadoop supergroup 0 2014-04-14 22:19 /tmp
我试试
[ec2-user@ip-172-31-0-185 input]$ /home/hadoop/bin/hdfs dfs -mkdir /tmp/stockmarkets
mkdir: Permission denied: user=ec2-user, access=EXECUTE, inode="/tmp":hadoop:supergroup:drwxrwx---
所以,要添加 ec2-user 以使用 hadoop,我按照以下说明操作:
http://cloudcelebrity.wordpress.com/2013/06/05/handling-permission-denied-error-on-hdfs/
但是在我写完之后(我用 ubuntu 他们代替了 ec2-user)
sudo adduser ec2-user hadoop
我得到的不是添加消息,而是:
Usage: useradd [options] LOGIN
Options:
-b, --base-dir BASE_DIR base directory for the home directory of the
new account
-c, --comment COMMENT GECOS field of the new account
-d, --home-dir HOME_DIR home directory of the new account
-D, --defaults print or change default useradd configuration
-e, --expiredate EXPIRE_DATE expiration date of the new account
-f, --inactive INACTIVE password inactivity period of the new account
-g, --gid GROUP name or ID of the primary group of the new
account
-G, --groups GROUPS list of supplementary groups of the new
account
-h, --help display this help message and exit
-k, --skel SKEL_DIR use this alternative skeleton directory
-K, --key KEY=VALUE override /etc/login.defs defaults
-l, --no-log-init do not add the user to the lastlog and
faillog databases
-m, --create-home create the user's home directory
-M, --no-create-home do not create the user's home directory
-N, --no-user-group do not create a group with the same name as
the user
-o, --non-unique allow to create users with duplicate
(non-unique) UID
-p, --password PASSWORD encrypted password of the new account
-r, --system create a system account
-s, --shell SHELL login shell of the new account
-u, --uid UID user ID of the new account
-U, --user-group create a group with the same name as the user
-Z, --selinux-user SEUSER use a specific SEUSER for the SELinux user mapping
所以我很困惑和搞砸了..请帮助>....
【问题讨论】:
标签: hadoop amazon-ec2 hdfs mkdir