8

on Ubuntu 16.04

sudo nano /etc/ssh/sshd_config
  1. change

    PermitRootLogin prohibit-password 
    

    to

    PermitRootLogin yes 
    
  2. sudo service ssh restart

still permission denied

1
  • 1
    16.04 Mine does not have this line. Simply adding it and restarting the service still doesn't make it work.
    – SDsolar
    Mar 6, 2018 at 0:07

1 Answer 1

10

on Ubuntu 16.04

  1. ensure you have openssh-server server installed sudo apt-get install openssh-server

    sudo nano /etc/ssh/sshd_config

    1. change

      PermitRootLogin prohibit-password

    to

    PermitRootLogin yes 
    

    or sudo sed -i 's/prohibit-password/yes/' /etc/ssh/sshd_config

    1. in order to PAM authentication add

      AllowUsers root

    or sudo echo "AllowUsers root" >> /etc/ssh/sshd_config

    1. sudo service ssh restart

works fine

in order you don't know your root password set new with privileged user

sudo passwd root

and you may want to get rid of password prompt in safe way what may be useful approach for sth like rsync, ansible and so on, so probably

from where ever you want to connect

ssh-keygen; ssh-copy-id -i ~/.ssh/id_rsa.pub root@YOURHOST

enter the root pass you have just set and DONE

ssh root@YOURHOST

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