user access?
 

i apply 777 permission to a file but i want to remove option to only owners hand how can i ???

Look at the documentation for "chmod".

In a shell (command prompt) type:

man chmod


"chmod" changes file mode bits, or permissions.

If you type:

chmod go-rwx

this will change mode (permission) for g (group) and o (others)
by removing (this is the -) r (read) w (write) x(execute).
This leaves only u (user) with read, write and execute permission.

After you do this, if you decide you want to give everyone read permission, you could type:

chmod go+r

and then g (group) and o (others) would get (this is the +) r (read) permission.