on server / computer hosting the meeting:
add user remoteguest:
useradd -m remoteguest
set suid:
chmod u+s /usr/bin/screen
give read permission:
chmod a+r /var/run/screen
share terminal session:
screen -L -S Multiuser
Set multiuser permission (hit Ctrl-A to enter commands when in screen):
:multiuser on :acladd remoteguest
on client / participant
login to host / server:
ssh ...
$USERNAME is the user under which you started the first screen command:
screen -x $USERNAME/Multiuser ssh remoteguest@192.168.111.157 screen -x glutz/Multiuser