about /dev/shm?

"Monty Ree" <[email protected]> Sat, 15 Apr 2006 15:14:10 +0000

Newsgroups	gmane.comp.security.linux
Message-ID	<[email protected]>

Hello, all.

As you know, /dev/shm is 1777 and attackers used to write his backdoors at 
that directory.
So I have saw the partition for some time and I can't see any creation of 
the files.
So I changed this permission to 755, and there was no problem.

1. What's the role of the /dev/shm?
   shm means shared memory?

2. Why this directory must be 1777?
   Is there any problem when I change the permission to like 755?
  
Thanks in advance.

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