A: In order to receive talk requests and writes to your account, you need to enable receipt of "messages". You can do this by adding the following line to your .cshrc file:
mesg y >& /dev/nullYou can place this line in the file using a text editor (e.g., Emacs or Pico) or by typing (exactly) the following line at the system prompt:
echo "mesg y >& /dev/null" >> ~/.cshrcOnce you've added the line to your .cshrc file, the last thing you need to do is type:
source ~/.cshrcto check and implement your changes. Other people will now be able to issue "talk" requests to your login session. Note that your account is now open to any garbage or control characters someone might send to your screen, as well as talk and write messages. The potential therefore exists for you to lose work because of someone sending disruptive messages to your screen. That is why mesg is set to n by default.