Install

All systems

curl cmd.cat/sgml2xml-isoent.sh

Debian

apt-get install docbook2X

Ubuntu

apt-get install docbook2X

Arch Linux

pacman -S docbook2X

Kali Linux

apt-get install docbook2X

Windows (WSL2)

sudo apt-get update sudo apt-get install docbook2X

Raspbian

apt-get install docbook2X

Dockerfile

dockerfile.run/sgml2xml-isoent