tldr/pages/linux/wall.md

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# wall
> Write a message on the terminals of users currently logged in.
> More information: <https://manned.org/wall>.
- Send a message:
`echo "{{message}}" | wall`
- Send a message from a file:
`wall {{file}}`
- Send a message with timeout (default 300):
`wall -t {{seconds}} {{file}}`