April 10, 2016


Sending Messages to Linux Users without Sudo

This may or may not work depending on the security preferences of the machine, but usually, you can use these commands even if you do not have sudo.

To broadcast a message to all users:

wall hello

All users currently on the machine would receive:

Broadcast message from [email protected] (pts/2) (Wed Apr 6 12:53:22 2016):

hello

To send messages directly to a user:

who
winstonc pts/247 Apr 6 12:04 (107-46-41-155-wireless1x.bu.edu)
huyle333 pts/249 Apr 6 12:07 (162-38-41-155-wireless1x.bu.edu)

Let’s say that I’m winstonc, and I want to send a message to huyle333. I take his username and pts/#.

write huyle333 pts/249

I write the following and hit enter each time.

hi
WHAT
THE

huyle333 recieves:

Message from [email protected] on pts/122 at 12:55 ...scc1:/project" 12:55 06-Apr-16
hi
WHAT
THE