authenticator command not found

Introduction

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

authenticator: command not found

or when using sudo you get the following error message

sudo: authenticator: command not found

Solutions to authenticator: command not found

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

In Ubuntu authenticator is provided by gnome-authenticator package.

gnome-authenticator is:

Authenticator is a GTK3 application for the GNOME desktop, featuring:

• QR code scanner
• Beautiful UI
• Huge database of more than 560 supported services
• Keep your PIN tokens secure by locking the application with a password
• Automatically fetch an image for services using their favicon
• The possibility to add new services

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

sudo apt-get -y install gnome-authenticator

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

You can also use apt command to install gnome-authenticator.

sudo apt -y install gnome-authenticator

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

sudo aptitude install gnome-authenticator

Summary

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