How to prevent root users from logging in directly in centos

First open the /etc/ssh/sshd.config file

vim /etc/ssh/sshd_config

Find the configuration

＃PermitRootLogin yes

Modify it to

PermitRootLogin no

As shown in the figure below:

Restart the sshd service, the command is as follows:

systemctl restart sshd.service

Recommended tutorial:centos tutorial

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