Cannot perform a remote backup to a Debian target server due to disabled root SSH access

Unlocking SSH Under Root on Debian OS Target Server Via Terminal for Remote Backup

Problem

Cannot perform a remote backup to a Debian target server.

Debian has SSH access under root user disabled by default.

Solution

Enable SSH access under the root user.

1. Access the terminal/console of the remote server.
2. Run the following command to permit root login:

sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/g' /etc/ssh/sshd\_config

3. Run the following command to restart the SSH service:

systemctl restart sshd.service

To re-secure the root account:

1. Access the terminal/console of the remote server.
2. Run the following command to permit root login:

   sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin no/g' /etc/ssh/sshd\_config

3. Run the following command to restart the SSH service:

   systemctl restart sshd.service

Updated on: 10/12/2025