ssh

p:: CLI

root user

sudo su

Set root password

passwd

New password:
Retype new password:
passwd: password updated successfully

Enable root login over SSH

vim /etc/ssh/sshd_config

Add below lines to end of file

PermitRootLogin yes
PasswordAuthentication yes

Save file and Restart SSH Server

systemctl restart sshd

Copy Public Key to your laptop using ssh-copy-id

ssh-copy-id [email protected]

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
[email protected]'s password:
 
Number of key(s) added:        1
 
Now try logging into the machine, with:   "ssh '[email protected]'"
and check to make sure that only the key(s) you wanted were added.

ssh [email protected]

Disable Password Authentication

vim /etc/ssh/sshd_config

Change below values

PermitRootLogin prohibit-password
PasswordAuthentication no

Save file and Restart SSH Server

systemctl restart sshd