unparser command not found

In this troubleshooting guide we learn how to fix unparser command not found error message

Introduction

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

unparser: command not found

or when using sudo you get the following error message

sudo: unparser: command not found

In Ubuntu unparser is provided by ruby-unparser package.

ruby-unparser is:

Unparser allows you to generate equivalent source for parser gem AST nodes.

The following constraints apply:

* No support for macruby extensions
* Only support for the modern AST format
* Only support for Ruby >= 2.5

It serves well for mutant mutators and the in-memory vendoring for self hosting, and other tooling.

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

sudo apt-get -y install ruby-unparser

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

You can also use apt command to install ruby-unparser.

sudo apt -y install ruby-unparser

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

sudo aptitude install ruby-unparser

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