This article will show you how Centrify can enable Linux to accept Google credentails for login, without having to add users locally. 

Requirements:

- Centrify Privilege Access Service (part of Centrify Infrastructure Services)

- G Suite domain

1. Add Google as a directory in Centrify

https://docs.centrify.com/Content/CoreServices/UsersRoles/GoogleDirectoryAdd.htm

2. Prepare your Linux system

Enable the following two settings in /etc/ssh/ssshd_config

• PubkeyAuthentication yes
• PasswordAuthentication yes

3. In the Centrify Admin Console, create a new Role called “Linux enrollment”

https://docs.centrify.com/Content/CoreServices/GetStarted/RolesAdd.htm

• Add your Centrify admin user as a member of this role.
• Add the Administrative Right: "Linux System Enrollment"

4. Download and install the Linux Agent

In the Centrify Admin Console, go to Downloads on the left column and download the Linux Agent installer for the corresponding Linux flavor.

5. Enroll the Linux system into Centrify

https://docs.centrify.com/Content/Infrastructure/privileged-identity-mgmt/svr_mgr_computer_cenroll.htm 

6. Enable permissions for the Google/Centrify/AD users to log into Linux system

https://docs.centrify.com/Content/Infrastructure/privileged-identity-mgmt/svr_mgr_agent_auth_access.htm

Note: The first time you log in you must use user@domain format. Afterwards you can use shortname.