Login In Oracle Database Service Cloud as root user

Cause :


Oracle doesn't allow direct access to root on cloud machines. sudo is the only option users have to access the root privileges.



Solution for the above issue:


1. change the below file


/etc/ssh/sshd_config


change 

PermitRootLogin no
to
PermitRootLogin yes


change 

AllowUsers opc oracle 
to
AllowUsers opc oracle root


2. copy the authorization keys from oracle home/opc/.ssh folder to /root/.ssh/   

cp /home/opc/.ssh/authorized_keys /root/.ssh/

OR  if there is a authorized_keys file already present in /root/.shh/ directory then append that file with the authorized_key present in /opc/.ssh/



3. service sshd restart


Try connecting to machine using the same private key as root user from putty.