A script to set DISPLAY variable when connecting using ssh to ubuntu to allow opening GUI applications from remote console.

x11frwrdngscrpt.sh

#!/usr/bin/env bash
# Add this to your `~/.$(echo $0 | tr -d "-")rc` file to run it for
# every shell instance

#####################################################################
# Add one of the following options to forward the displace from WSL
# outside

#####################################################################
# Option 1 @ port 0

export DISPLAY=$(ip route|awk '/^default/{print $3}'):0.0

#####################################################################
# Option 2 @ port 7

# check if the user is connected using ssh
if [[ -v $SSH_CLIENT ]];
then
    export DISPLAY=$(echo $SSH_CLIENT | cut -d " " -f 1 ):7.0
    printf "DISPLAY variable has been set to $DISPLAY"
else
    printf "Not using SSH. DISPLAY is $DISPLAY"
fi