Artificial intelligent assistant

Alert in virtual console How do I show an alert in virtual console ttyX (not necessarily the active one) so that the user sees the alert on the next command invocation. I'm looking for something similar to the "you have mail" alert.

If you know which user is logged in on which virtual console, you can use `write`. E.g., assume user `dirk` is logged in on `tty2`, you can do


echo 'You have a message' | write dirk tty2


and the user will see the message (with two additional lines). The user on the virtual console needs to enable receiving messages with `mesg y`, unless you send the message as root IIRC. The user sees this message immediately, no matter if he invokes a command or not.

The alternative would be to hook into the shell of the user (possible using the `PS` prompts) by setting up `.profile` etc. to actively check for messages in some file etc.

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