Logging in as root on Oracle Cloud Ubuntu with WinSCP

When connecting to Oracle Cloud with WinSCP, sometimes you need to log in as root. I usually just log in as root to take care of things because it’s easier. Whe

GGAMI·2025-02-23

When connecting to Oracle Cloud with WinSCP, sometimes you need to log in as root.

I usually just log in as root to take care of things because it’s easier.

When I tried to log in with WinSCP, I found that Oracle Cloud had completely disabled SSH password authentication.

vim /etc/ssh/sshd_config

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PermitRootLogin

yes

systemctl restart

ssh

Uncomment PermitRootLogin yes here and set it to yes.

Of course, after logging in as root with sudo -i

ssh-keygen -t rsa -b 4096 -f /root/.ssh/new_key

cat /root/.ssh/new_key.pub

sh -c 'cat /root/.ssh/new_key.pub >> /root/.ssh/authorized_keys'

chmod 600 /root/.ssh/authorized_keys
chmod 700 /root/.ssh

This way, use ssh-keygen to create the new_key file.

After that, create a separate file for new_key on Windows.

After saving it as the server-root.key file

In WinSCP, go to 고급 설정 - SSH - 인증 and set it to 개인키 파일.

Then log in with 사용자 이름 set to root, and the login will succeed.

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