Runing GUI package problem in another user mode

To change a user shell

chsh -s /bin/bash

you are login with user picklu and now a you want to run a GUI package with user mishu and the GUI fails. There are two ways to solve this issue:

1. cd /home/picklu

cp .Xauthority /home/mishu

OR

2. xhost +x

export DISPLAY=:0.0

then run the package. Then you can get the GUI interface of the installer.