Talk over the console

First install talk & talkd
apt-get install talk talkd 


developer@ubuntu:~$ mesg 
mesg is n 
to change mesg
developer@ubuntu:~$ mesg y

mesg is y
Talk on a LAN network 



user bob wants to chatt with sawar 
talk sawar@172.16.1.108 

At host sawar the follow is prompt

Message from Talk_Daemon@server1 at 22:44 ...    
talk: connection requested by bob@172.16.1.101. 
talk: respond with:  talk bob@172.16.1.101  


Respond with talk bob@172.16.1.101   

Done. -