jlex command not found

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

Introduction

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

jlex: command not found

or when using sudo you get the following error message

sudo: jlex: command not found

In Ubuntu jlex is provided by jlex package.

jlex is:

The JLex utility is a lexical analyser generator, modelled after the popular UNIX “lex” utility.

JLex takes a specification file similar to that accepted by Lex, then creates a Java source file for the corresponding lexical analyzer.

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

sudo apt-get -y install jlex

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

You can also use apt command to install jlex.

sudo apt -y install jlex

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

sudo aptitude install jlex

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