Centos disables root user ssh remote login

Centos disables root user ssh remote login
In CentOS, root has almost all permissions. Once the root user password is leaked, it will be a fatal threat to the server and prohibit root users from remotely logging on through ssh, in this way, even if the root user password is leaked, the server security can be guaranteed.

1: create a common user, doiido, and add it to the corresponding group.
Note: You must create a new user. Otherwise, you may not be able to remotely log on to the server through ssh.
# Groupadd doiido
# Useradd-g doiido
Change doiido Password
# Passwd doiido

2: Modify the sshd_config file
# Sed-I's/# PermitRootLogin yes/PermitRootLogin no/'/etc/ssh/sshd_config


3: restart the ssh service.
# Service sshd restart


In this way, even if the root user password is disclosed, other users cannot directly connect to the server through the root user.