To enable SSH login for a root user on Debian 8 Jessie, you need to configure the SSH server config.
Open /etc/ssh/sshd_config
and change:
PermitRootLogin without-password
to:
PermitRootLogin yes
Save the configuration file and then restart the SSH server:
#service ssh restart
Category Archives: Debian 8
Debian 8 Jessie Posts