仅更改其他人的权限

Question

我在 HDFS 上有以下目录（大致遵循 POSIX 模型）：

[ojoqcu@sandbox ~]$ hdfs dfs -ls /
Found 11 items
drwxrwxrwx   - yarn   hadoop          0 2016-03-14 14:19 /app-logs
drwxr-xr-x   - hdfs   hdfs            0 2016-06-27 09:40 /apps
drwxr-xr-x   - yarn   hadoop          0 2016-03-14 14:19 /ats
drwxr-xr-x   - hdfs   hdfs            0 2016-03-14 14:50 /demo
drwxr-xr-x   - hdfs   hdfs            0 2016-03-14 14:19 /hdp
drwxr-xr-x   - mapred hdfs            0 2016-03-14 14:19 /mapred
drwxrwxrwx   - mapred hadoop          0 2016-03-14 14:19 /mr-history
drwxr-xr-x   - hdfs   hdfs            0 2016-03-14 14:42 /ranger
drwxrwxrwx   - spark  hadoop          0 2016-06-27 10:02 /spark-history
drwxrwxrwx   - hdfs   hdfs            0 2016-06-27 09:38 /tmp
drwxr-xr-x   - hdfs   hdfs            0 2016-06-27 09:38 /user

很明显，'others'可以自由操作这些目录。

我希望保留所有者和群组权限 unchanged/as-is 但将 'others' 更改为自定义形式，例如

drwxr-xr-x   - hdfs   hdfs            0 2016-06-27 09:40 /apps

to

drwxr-x---   - hdfs   hdfs            0 2016-06-27 09:40 /apps

drwxr-xr-x   - hdfs   hdfs            0 2016-03-14 14:19 /hdp

to

drwxr-xr--   - hdfs   hdfs            0 2016-03-14 14:19 /hdp

在极端情况下，我可能只需要向其他用户提供读取权限或根本不提供访问权限，例如：

drwxrwxr--   - yarn   hadoop          0 2016-03-14 14:19 /app-logs
drwxr-xr--   - hdfs   hdfs            0 2016-06-27 09:40 /apps
drwxr-xr--   - yarn   hadoop          0 2016-03-14 14:19 /ats
drwxr-xr--   - hdfs   hdfs            0 2016-03-14 14:50 /demo
drwxr-xr--   - hdfs   hdfs            0 2016-03-14 14:19 /hdp
drwxr-xr--   - mapred hdfs            0 2016-03-14 14:19 /mapred
drwxrwxr--   - mapred hadoop          0 2016-03-14 14:19 /mr-history
drwxr-xr--   - hdfs   hdfs            0 2016-03-14 14:42 /ranger
drwxrwxr--   - spark  hadoop          0 2016-06-27 10:02 /spark-history
drwxrwxr--   - hdfs   hdfs            0 2016-06-27 09:38 /tmp
drwxr-xr--   - hdfs   hdfs            0 2016-06-27 09:38 /user

如何在不指定所有者和组的位的情况下递归执行此操作？

Answer 1

取自此处：https://www.washington.edu/computing/unix/permissions.html

To change the mode of a file, use the chmod command. The general form is
  chmod X@Y file1 file2 ...
where: X is any combination of the letters 'u' (for owner), 'g' (for group), 'o' (for others), 'a' (for all; that is, for `ugo'); @ is either '+' to add permissions, '-' to remove permissions, or '=' to assign permissions absolutely; and Y is any combination of 'r', 'w', 'x'. Following are some examples:
 chmod u=rx file        (Give the owner rx permissions, not w)
 chmod go-rwx file      (Deny rwx permission for group, others)
 chmod g+w file         (Give write permission to the group)
 chmod a+x file1 file2  (Give execute permission to everybody)
 chmod g+rx,o+x file    (OK to combine like this with a comma)

所以根据这个，答案将是：

chmod -R o-wx path

仅更改其他人的权限

Change permissions for others ONLY

linux

file-permissions

chmod