export variable from one shell to another (global variable?)

[phillips321]

Hi guys,

Lets say i have 2 terminals open.
if in terminal 1 i type

export MYVALUE=1

and in terminal 2 i type

echo ${MYVALUE}

I don't get any output, how can i assign a variable in one terminal and ensure it is global so that it can be read in another terminal?

Many thanks