How To Install google-authenticator on CentOS 7
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.