The easiest way to connect to a Linux system remotely is with Secure Shell (SSH). In order to connect to your Linux server, you’ll need a an SSH client. PuTTy is an easy, free SSH and telnet client. You can download PuTTy here: https://www.putty.org/
After downloading it, open the connection settings and create a new session as follows:

- Enter your server IP or domain name. If SSH is on a port other than 22, type the port.
- Enter your session name and press “Save”.
- Click “Open”.
Now you have access to a terminal, just like you would if you were using the Linux machine directly. If the server is online, you will see this login screen:

Type your username and press “Enter”. “root” is the highest-level administrator account on a Linux system, so it’s a common choice.

Now you can enter your password and press “Enter”. Keep in mind that no
password symbols will be shown when entering the password. This is done for security reasons.
If the password is correct, you will be successfully connected.
How can you change the root password?
Enter the command below:
sudo passwd root
You will see option to enter a new password, where symbols will not be shown for security reasons.

Congratulations! Now you connected to your Linux server using Windows. Using the Linux command-line interface requires a bit of knowledge and experience. You can install a graphical user interface (GUI) from the command line to use it like a normal desktop computer.
You can find more information about Ubuntu GUI installation HERE.