access permissions take a different meaning for directories. Here's what they mean:

• Read determines if a user can view the directory's contents, i.e. do ls in it.
• Write determines if a user can create new files or delete file in the directory. (Note here that this essentially means that a user with write access to a directory can delete files in the directory even if he/she doesn't have write permissions for the file! So be careful with this.)
• eXecute determines if the user can cd into the directory.
To be safe you should keep R and X together on directories.


in your case you have no "X" and so cant CD into the directory.