Sometimes, some users prefer to write user pts/n to give the name of the of the user who send a message, but in case the user is busy and important things do not want to receive such information?
users can use the mesg n forbidden to send a message to him, in fact, is the prohibition of others to the terminal above the write permissions. When people try to write to him to send information, the sender will see the prompt:
write: the user has messages disabled on pts/n?
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