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• To disable root login, open the main ssh configuration file /etc/ssh/sshd_config with your choice of editor.
  • # vi /etc/ssh/sshd_config
• Search for the following line in the file.
  • #PermitRootLogin no
• Remove the ‘#‘ from the beginning of the line.  Make the line look like similar to this.
  • PermitRootLogin no
• Next, we need to restart the SSH daemon service.
  • # /etc/init.d/sshd restart
• Now try to login with root user, you will get “Access Denied” error.
• So, from now onwards login as normal user and then use ‘su’ command to switch to root user.