disjoint_union_adj command not found

Introduction

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

disjoint_union_adj: command not found

or when using sudo you get the following error message

sudo: disjoint_union_adj: command not found

Solutions to disjoint_union_adj: command not found

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

In Ubuntu disjoint_union_adj is provided by polylib-utils package.

polylib-utils is:

Polylib is a free C library for doing computations on polyhedra. The library is operating on objects like vectors, matrices, lattices, polyhedra, Z-polyhedra, unions of polyhedra and other intermediary structures. It provides functions for all important operations on these structures.

This package contains various utilities to perform polyhedral operations.

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

sudo apt-get -y install polylib-utils

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

You can also use apt command to install polylib-utils.

sudo apt -y install polylib-utils

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

sudo aptitude install polylib-utils

Summary

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