Linux adds SSH permissions to ordinary users

Linux system installed, after the establishment of ordinary users, ordinary users may not be able to connect to the server via SSH

You can add allowusers:username to the/etc/ssh/sshd_config

(Can be multiple, separated by a space) to increase SSH permissions for ordinary users

You can also set up a user/user group that allows and denies SSH:

Denyusers:username,denygroups:groupname

The priority levels are as follows:

Denyusers:username

Allowusers:username

Denygroups:groupname

Allowgroups:groupname

After you set up SSH permissions for a normal user, you can disable the root SSH privilege to increase security

(You can also modify the Permitrootlogin option in Sshd_config to: Permitrootlogin no)