Using SSH over Ethernet as Root Account

After the new system is installed, the rejected connection denial appears when you try to log on to the Ubuntu Linux server as a root user. Here is the example information:

$ ssh root@192.168.120.41
ssh: connect to host 192.168.120.41 port 22: Connection refused

To enable SSH root login, perform the following steps:

Run the following command to configure the SSH server:
```
echo 'PermitRootLogin=yes'  | sudo tee -a /etc/ssh/sshd_config
```

Restart the SSH server:

sudo systemctl restart ssh.service

Result:

You will be able to use SSH login using the root account. The following output indicates the login is successful:

Example Output:

$ ssh root@192.168.120.79
The authenticity of host '192.168.120.79 (192.168.120.79)' can't be established.
ECDSA key fingerprint is SHA256:WhxBNiLBOS3J0IzNyBBuOeoNDRVqVQXfxC4MjZ7tbbo.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.120.79' (ECDSA) to the list of known hosts.
root@192.168.120.79's password: 
Welcome to Ubuntu 24.04.3 LTS (GNU/Linux 6.12.5-starfive riscv64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/pro

 System information as of Wed Oct 15 06:46:40 UTC 2025

  System load:  3.19              Temperature:           49.4 C
  Usage of /:   9.0% of 51.15GB   Processes:             226
  Memory usage: 13%               Users logged in:       1
  Swap usage:   0%                IPv4 address for eth0: 192.168.120.79


Expanded Security Maintenance for Applications is not enabled.

23 updates can be applied immediately.
16 of these updates are standard security updates.
To see these additional updates run: apt list --upgradable

Enable ESM Apps to receive additional future security updates.
See https://ubuntu.com/esm or run: sudo pro status


The list of available updates is more than a week old.
To check for new updates run: sudo apt update

root@starfive:~#