Create multiple sessions per user such as grid and oracle, for each student a dedicated session

make-vncs.sh

$ sudo su - oracle 
$ vncserver :50 -geometry 820x640  <-- best viewing on Guacamole
{{ Loop to recreate sessions per user}}
{{ run by root, creates 10 sessions for oracle :50-59, and 10 for grid :60-69}}
{{ must run on each node rac1, rac2, rac3 }}
#!/bin/bash
# Usage: make-vncs.sh  <-- will create 10 sessions for oracle 50-59,
# and 10 sessions for grid 60-69
# run as sudo
START=0
END=10

 VNCPASSWD=Pa55w0rd

 su - -c "echo $VNCPASSWD | vncpasswd -f > /home/oracle/.vnc/passwd" -s /bin/bash oracle
 su - -c "echo $VNCPASSWD | vncpasswd -f > /home/grid/.vnc/passwd" -s /bin/bash grid
for ((i=$START; i<$END; i++))
do
 oracle=$((i + 50))
 grid=$((i + 60))
 echo "Oracle :$oracle Grid :$grid"
 su - -c "vncserver -kill :$grid" -s /bin/bash grid
 su - -c "vncserver -kill :$oracle" -s /bin/bash oracle
 su - -c "vncserver :$oracle -geometry 980x640" -s /bin/bash oracle
 su - -c "vncserver :$grid -geometry 980x640" -s /bin/bash grid
done
printf "oracle user sessions"
printf "\n-------------------"
su - -c "vncserver -list" -s /bin/bash oracle
printf "\n\ngrid  user sessions"
printf "\n-------------------"
su - -c "vncserver -list" -s /bin/bash grid

restart-vncs.sh

#!/bin/bash
# Usage: make-vncs.sh  <-- will create 10 sessions for oracle 50-59,
# and 10 sessions for grid 60-69
START=0
END=10
for ((i=$START; i<$END; i++))
do
 oracle=$((i + 50))
 grid=$((i + 60))
 echo "Oracle :$oracle Grid :$grid"
 sudo su - -c "vncserver -kill :$oracle" -s /bin/bash oracle
 sudo su - -c "vncserver -kill :$grid" -s /bin/bash grid
 sudo su - -c "vncserver :$oracle -geometry 980x640" -s /bin/bash oracle
 sudo su - -c "vncserver :$grid -geometry 980x640" -s /bin/bash grid
done
echo "oracle user sessions"
echo "-------------------"
sudo su - -c "vncserver -list" -s /bin/bash oracle
printf "\n\ngrid  user sessions"
echo "-------------------"
sudo su - -c "vncserver -list" -s /bin/bash grid