$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

Step-by-step – GKSu Debian Stretch Installation

February 6, 2021 | By the+gnu+linux+evangelist.

GNU/Linux Debian Stretch Installing GKSu – QuickStart Guide

Hi! The Tutorial shows you Step-by-Step How Emulate GKSu in Debian Stretch 9.x GNU/Linux Desktop.

And GKSu for Debian Stretch is a Library that provides a Gtk+ Frontend to su and sudo.

Moreover, it supports login shells and preserving environment when acting as a su frontend. It is useful to Menu items or other Graphical Programs that need to ask a user’s Password to run another Program as another User.

Especially relevant: GKSu is NOT ANYMORE AVAILABLE, it has been definitively removed from Repos for SECURITY ISSUES concerns.

So see instead the: GKSu Alternative Pkexec.

Step-by-step – GKSu Debian Stretch Installation Guide

  1. Running Program

    Hence to Run GUI App as another User on Linux
    The General Command is:

    sudo pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY [MYPROGRAM]
    Like: 
    sudo pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY /usr/local/bin/hardinfo