dtdformat command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

dtdformat: command not found

or when using sudo you get the following error message

sudo: dtdformat: command not found

Solutions to dtdformat: command not found

How To Fix dtdformat: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu dtdformat is provided by libsgml-dtdparse-perl package.

libsgml-dtdparse-perl is:

The DTDParse collection is a set of Perl modules and scripts for manipulating SGML and XML Document Type Definitions (DTDs). DTDParse is designed primarily to aid in the understanding and documentation of DTDs.

To fix this problem, we can install more using the command below.

sudo apt-get -y install libsgml-dtdparse-perl

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install libsgml-dtdparse-perl.

sudo apt -y install libsgml-dtdparse-perl

Or if you have aptitude installed you can use the following command.

sudo aptitude install libsgml-dtdparse-perl

Summary

In this tutorial we learn how to fix dtdformat command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.