How to Allow Only root User to Login Through SSH
(Doc ID 1614856.1)
Last updated on APRIL 22, 2020
Applies to:Linux OS - Version Oracle Linux 5.0 and later
Oracle Cloud Infrastructure - Version N/A and later
By default all users can SSH login the system with a valid password/public key.
For certain dedicated Servers, such as FTP Server, E-mail Server, etc. which have amount of user accounts shared authentication with Linux system, disabling non-root users to login through SSH will be a wise choice in this scenario.
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In this Document
|Method 1 could be used to allow a few users to SSH login|
|Method 2 is quickest way to block all non-root users from SSH login|
|Method 3 could be used to allow a large number of users to login through SSH by providing a user list|