How To Install google-authenticator on CentOS 7

In this tutorial we learn how to install google-authenticator on CentOS 7. google-authenticator is One-time pass-code support using open standards

Introduction

In this tutorial we learn how to install google-authenticator on CentOS 7.

What is google-authenticator

The Google Authenticator package contains a plug-able authentication module (PAM) which allows login using one-time pass-codes conforming to the open standards developed by the Initiative for Open Authentication (OATH) (which is unrelated to OAuth). Pass-code generators are available (separately) for several mobile platforms. These implementations support the HMAC-Based One-time Password (HOTP) algorithm specified in RFC 4226 and the Time-based One-time Password (TOTP) algorithm currently in draft.

We can use yum or dnf to install google-authenticator on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install google-authenticator.

Install google-authenticator on CentOS 7 Using yum

Update yum database with yum using the following command.

sudo yum makecache

After updating yum database, We can install google-authenticator using yum by running the following command:

sudo yum -y install google-authenticator

Install google-authenticator on CentOS 7 Using dnf

If you don’t have dnf installed you can install DNF on CentOS 7 first. Update yum database with dnf using the following command.

sudo dnf makecache

After updating yum database, We can install google-authenticator using dnf by running the following command:

sudo dnf -y install google-authenticator

How To Uninstall google-authenticator on CentOS 7

To uninstall only the google-authenticator package we can use the following command:

sudo dnf remove google-authenticator

References

Summary

In this tutorial we learn how to install google-authenticator on CentOS 7 using yum and dnf.