#An example
IP=80.123.202.12 ; export
echo $IP
>80.123.202.12

#SWITCH SHELL
echo $IP
>

#The IP address changed
unset IP
IP=85.211.111.42
echo $IP
>85.211.111.42

#Want to be able to change the content of the variable often and easy.
#Want the variable to be available in other SHELLs.