I have the biggest man-crush on screen.

Sharing Screens with Coworkers

A linux.com article shows you how to do this. Article in a brief instant::

You (username: bob):

$ screen -S easy_to_remember_session_name
Control-A :multiuser on
Control-A :acladd other_person_short_login_name
Control-A :acladd root  # <-- in case other person is using sudo screen -x...

They:

screen -x bob/easy_to_remember_session_name
   OR
sudo screen -x bob/easy_to_remember_session_name

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