What command will allow you to send a message to all currently logged on users?

CORRECT TEXT
You wish to notify all users that you have to take down a service on which they rely. What
command will allow you to send a message to all currently logged on users? Enter only the
command, not the path.

CORRECT TEXT
You wish to notify all users that you have to take down a service on which they rely. What
command will allow you to send a message to all currently logged on users? Enter only the
command, not the path.

Answer: wall

Explanation:

from the man pages:
wall – write a message to users
Wall displays the contents of file or, by default, its standard input, on the terminals of all currently
logged in users. Only the super-user can write on the terminals of users who have chosen to deny
messages or are using a program which automatically denies messages.



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