I am pretty new to Linux. My client has a Linux(Centos) server. There is a folder which has been shared and users have created their own folders under this shared folder. Now if user B tries to change a file created by user A or tries to save the file under a different name it gives a permission issue. I use webmin to administer the server as I am completely new. I want any user to be able to read, write and delete files in any folder irrespective of who created it. Please help!

As root you can go to the folder in question and execute command:
This command also allows anybody to execute any file in that folder. If that's not what you want then just remove the "x" from the command.
Cheers,
jdk

Please try to take into account OP clearly declares himself a novice (as using any webbased admin panel often indicates). That doesn't absolve him from getting required knowledge but not asking for the reasons why this is necessary and offering an uprotected glob is IMHO is not the right way to promote safe usage. using something like ACL might.


Since directories aren't searchable for a user without xecute bit, I wonder what sense it makes then?

I would request you give a strong reason behind this. It is really not safe to allow everyone full control of folders they do not own. Privacy is also something you need to respect in this regard.
It is not a very wise decision to allow full control to everyone. Someone might just with fun loving attitude delete the files and never tell he/she did it. And that you do not have much experience with Linux it would be difficult to trace the things in future.

Ok I need to type much faster than I do. I will have to learn it. unspawn has already taken the same points.

Sorry about that. You're quite right of course. My impression was that the OP was only talking about files in the users' home directories and that sensitive areas that could affect the functioning of the system.

I meant remove the x in the command (use chmod ugoa+rw *) in the first instance if it was deemed inappropriate.
cheers,
jdk

A lot of questions after all are one-dimensional and require few words. But in some cases users may have read about just one "solution" and won't ask for other ways. Asking for clarification will not only help you help the OP (by being able to formulate a suitable answer) but also help the OP (and anyone reading the thread long after) see that GNU/Linux is versatile in more than one way. No need to apologise.

Giving permissions to all users on all folders is a client requirement. How do I execute the command in Webmin?? Sorry but i did say i am a noob