在由root拥有的Centos 6.2上安装Dropbox。 演示保pipe箱文件夹由root拥有，并具有对所有人的读取权限
“root”用户为所有用户提供读取权限
[root@localhost Dropbox]# ls -la total 436 drwxr--r--. 6 root root 4096 Jul 17 20:01 . drwxr-xr-x. 3 root root 4096 Jul 11 20:11 .. -rw-r--r--. 1 root root 29 Jul 17 20:01 .dropbox drwxr-xr-x. 4 root root 151552 Jul 17 20:03 .dropbox.cache drwxr-xr-x. 2 root root 4096 Jul 11 19:28 ePubs to Share drwxr-xr-x. 4 root root 4096 Jul 11 20:14 ePubs to Share (1) -rw-r--r--. 1 root root 269894 Jun 7 2010 Getting Started.pdf drwxr-xr-x. 6 root root 4096 Jul 17 20:03 stagbuild [root@localhost Dropbox]# cd .. [root@localhost DropboxRoot]# ls -la total 12 drwxr-xr-x. 3 root root 4096 Jul 11 20:11 . drwx------. 48 epub epub 4096 Jul 17 20:01 .. drwxr--r--. 6 root root 4096 Jul 17 20:01 Dropbox [root@localhost DropboxRoot]# 但“epub”用户无法看到/读取此目录中的任何文件：
cd DropboxRoot [epub@localhost DropboxRoot]$ ls -la total 12 drwxr-xr-x. 3 root root 4096 Jul 11 20:11 . drwx------. 48 epub epub 4096 Jul 17 20:01 .. drwxr--r--. 6 root root 4096 Jul 17 20:01 Dropbox [epub@localhost DropboxRoot]$ ls -la Dropbox/ ls: cannot access Dropbox/stagbuild: Permission denied ls: cannot access Dropbox/Getting Started.pdf: Permission denied ls: cannot access Dropbox/ePubs to Share (1): Permission denied ls: cannot access Dropbox/.: Permission denied ls: cannot access Dropbox/..: Permission denied ls: cannot access Dropbox/.dropbox.cache: Permission denied ls: cannot access Dropbox/ePubs to Share: Permission denied ls: cannot access Dropbox/.dropbox: Permission denied total 0 d????????? ? ? ? ? ? . d????????? ? ? ? ? ? .. -????????? ? ? ? ? ? .dropbox d????????? ? ? ? ? ? .dropbox.cache d????????? ? ? ? ? ? ePubs to Share d????????? ? ? ? ? ? ePubs to Share (1) -????????? ? ? ? ? ? Getting Started.pdf d????????? ? ? ? ? ? stagbuild [epub@localhost DropboxRoot]$
有任何想法吗？
对于目录来说，读取权限是不够的。 您还需要执行权限才能进入目录。