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I'm running Lion (10.7.1) and the other day I started getting these Broadcast Message notices in my Terminal. I've google'd the crap out of it and the few threads i've found where someone actually offered a way to fix it haven't solved my problem. I'm at a loss as to how to fix this and I use the Terminal daily and it is very annoying.

Broadcast Message from root@Gregg-Bolingers-iMac.local                         
        (no tty) at 18:31 CST...                                               

Feb 21 18:31:14 Gregg-Bolingers-iMac kernel[0]:  

Looking at my system.log the only thing I get when this happens is:

Feb 21 18:31:55: --- last message repeated 22898 times ---
Feb 21 18:31:54 Gregg-Bolingers-iMac kernel[0]: 
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And now it has stopped. No idea what has changed. Frustrating. – Gregg Feb 25 '12 at 19:46
And now it is happening again. – Gregg Feb 27 '12 at 18:00
sudo chmod 0 /usr/bin/wall :-) – Ingmar Hupp Apr 16 '12 at 14:11
What does that do? – Gregg Apr 16 '12 at 17:37
See @emb's description. But don't do it - that'd be like smashing your TV because you don't agree with something it shows to you. Better to find and fix the actual cause :) – Ingmar Hupp Apr 17 '12 at 3:07

The command Ingmar Hupp provided removes all access to your 'wall' program. This 'write all' program will send a message to all users logged into the system at one point.

I am assuming no one else has access to your machine, so perhaps there is a program you use that makes an errant (or perhaps malicious) call to /usr/bin/wall?

By changing the permissions of /usr/bin/wall to 0, no internal or external source should be able to read, write or execute the program.

Hope this explanation helps!

One more thought: Have you updated your OS to the most recent version? I have come across other instances of this where users traced the issue back to a security update released by Apple.

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