rlock command not found

Introduction

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

rlock: command not found

or when using sudo you get the following error message

sudo: rlock: command not found

Solutions to rlock: command not found

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

In Ubuntu rlock is provided by ruby-lockfile package.

ruby-lockfile is:

This is a Ruby library for creating lockfiles safe for use over NFS (Network File System).

The package contains both the library for including lockfile in Ruby programs and the command line program rlock. The program rlock can either create lockfiles or optionally can run a program with a lockfile.

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

sudo apt-get -y install ruby-lockfile

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

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

sudo apt -y install ruby-lockfile

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

sudo aptitude install ruby-lockfile

Summary

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