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I have 2 users : User1 is connected on tty1 and User2 is connected on tty2.

The output of mesg on both ttys is is y.

On tty1, when I type write User2 tty2, I get write: User2 has messages disabled on tty2.

What am I forgetting?

EDIT: My operating system is Arch Linux and no ssh is involved.

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  • Can you add users to group tty, and check again? Commented Mar 29, 2015 at 17:48

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here on my debian 8 system, /usr/bin/write is symlink to /usr/bin/bsd-write and have setgid tty group and /dev/tty{0..63} are group writable.

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  • Adding the users to tty group solved it. Commented Apr 20, 2015 at 9:12

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