1. Find which port that the receiver are currently in. Look at the pts/<the-port-number>
# who root pts/0 Jan 13 14:22 root pts/2 Jan 13 14:23 root pts/3 Jan 13 14:23 root pts/7 Jan 24 05:40 root pts/1 Jan 24 05:39
2. Run below command and start typing the message
# cat > /dev/pts/7 hello testing bye
• The receiver will receive the message like this..
hello testing bye
Additional note:
• The receiver cannot reply the message to the sender.
