Users permissions

[Muhammad Rizwan]

Hello

I want to set following user permissions on files and folders.

1- Set the same permissions on all the contents of selected directory.
2- Set the same permissions on all the files of selected directory
(files).
3- Set the user permission to delete the file or folder (in addition to
read, write and execute).

I want to set all these permission though command line rather then by
using GUI. 
Is there any idea with you...

Thanks!