====== Debian 11 Install GKSU ======

First Add Debian 9 sources. DELETE file after install... .
<code>cat <<EOF | tee /etc/apt/sources.list.d/debian9.list deb http://archive.debian.org/debian/ stretch main
deb-src http://archive.debian.org/debian/ stretch main

deb http://archive.debian.org/debian-security stretch/updates main
deb-src http://archive.debian.org/debian-security stretch/updates main

deb http://archive.debian.org/debian/ stretch main contrib non-free
deb-src http://archive.debian.org/debian/ stretch main contrib non-free

EOF</code>

Update package cache

<code>apt update</code>

Install necessary build tools

<code>apt install -y build-essential debhelper dpkg-dev</code>

Install build-dependencies for gksu and compile its source package

<code>apt build-dep gksu</code>
<code>apt source --compile gksu</code>

Install self-compiled gksu packages:

<code>apt install -y ./*gksu*.deb</code>

Remove Debian 9 repository from system for safety

<code>rm /etc/apt/sources.list.d/debian9.list</code>


Credits: [[https://ubuntu-mate.community/t/for-anyone-who-still-needs-or-wants-gksu/16744|artful]]