Send Messages to Other Users on a Cisco Router
Multiple users can be logged into a Cisco router at the same time. It may be necessary (or sometimes just fun) to send a text message to one or all users on a router. For example, if you are preparing to reload the router, admin etiquette dictates that you should warn other users.
To send a message to all users on the current device, use the send * command with administrator privileges:
Enter message, end with CTRL/Z; abort with CTRL/C:
The sky is falling, so I'm going to reload the router in 5 minutes.
It's been nice knowing you.
Using the show users command described in this recipe, you can get the line number of a specific user. If the user is logged into line 66, use this command to send them a message:
The command to send a message to the user on the console is as follows:
send console 0
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