Can't connect to X server
 

when i try to run the cavity tutorial simulation, i get this error

bash-4.1$ paraFoam &
[1] 413
bash-4.1$ Created temporary 'cavity.OpenFOAM'
paraview: cannot connect to X server

i very new to this im not sure what to do
any help will be much appreciated

Are you running this locally on a Linux machine, in an x-terminal, or over some kind of remote connection?

Can you run other graphical programs, like gedit ?