8

This is one entry of the output of who:

yang     pts/6        2011-06-22 09:25 (10.231.22.12)

Is there a way to send a message there?

13

Try this:

write yang /dev/pts/6
#type your message
#ctrl + D (EOF) 

see: man 1 write


or echo "message" > /dev/pts/6

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