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1. Download the Oracle VM VirtualBox. 
   
2. Open the downloaded file to install the program.
   
3. Click Next.
   
4.  Select the way for installation and click Next. 
   
5. Select appropriate options and click Next.
   
6. Confirm installation by clicking Yes and then Install.
   
7. Finish the process.
   
8. Download the Ubuntu server image and configure the virtual machine.
   
9. Open the Oracle VM VirtualBox and click New.
   
10. Select downloaded in the Step 8 file. 
    
11. Create a username and password and click Next. We recommend the following values, e.g.: 
    • username: linkuser
    • password: qwerty11!@
      
12. Set base memory as shown.
    
13. Create a Virtual disk with the following parameter and click Next.
    
14. Click Finish.
    
15. Open your machine settings.
    
16. Go to the Network tab and set the following adapter settings as shown on the screen. Click Ok.  
    
17. Start the created machine. 
    

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1. Select a language and click Enter.
   
2. Press Continue without updating option.
   
   
3. Press Done on the next 6 pages.
   
   
4. Press Continue.
   
   
5. Fill in the required fields with the following data and click Done when it is ready, for example: 
   

   • your name: linkuser

   • your server’s name: linkuser

   • pick a username: linkuser

   • choose a password: qwerty11!@

   • confirm your password: qwerty11!@
     
     

6. Press the space bar to choose the Install OpenSSH server option and press Done.
   
7. Scroll down and press Done.
   
   
8. Wait for the system to update. It can take about 30 minutes.
   
9. Press Reboot Now.
   
   
10. After reboot enter your login and password (created in step 5) and log in:login: linkuser password: qwerty11!@
    Image Modified

11. To run a command as administrator (user “root”), use the command: sudo su. Enter password qwerty11!@. The dollar icon should change to a hash.
    

12. Enter the ifconfig command to find out the IP address (in the future you can use as static it or register another one).
    
13. You can perform the following steps in the SSH and telnet client PuTTY. After downloading and installing, run the program.
    
14. Enter the address you found and press Open.
    
    
15. Press Accept.
    
    
16. Return to Oracle VM VirtualBox and enter your login and password to log in: 
    • login: linkuser
    • password: qwerty11!@
      To run a command as administrator (user “root”), use the command: sudo su. Enter password qwerty11!@. The dollar icon should change to a hash.
      
17. Go to the root folder: cd ../../

18. Go to the Netplan section and open the document to edit the network settings:
    

    Code Block
    cd etc/netplan ls vi 00-installer-config.yaml

    
    

19. The network is configured for DHCP. You need to set up a static IP address.
    
    
20. Press "I" to switch to edit mode and adjust the settings as shown in the example:

    • addresses: [192.168.1.23/24] (where 192.168.1.23 is your local IP address, /24 is your subnet mask (255.255.255.0), if you have another subnet mask, check the correct number here)

    • gateway4: 192.168.1.1

    • nameservers: addresses: [192.168.1.1,8.8.8.8]
                            search: []

21. Press Esc and then Shift Z twice.

    

22. Accept the network settings. Check if the internet connection is working.

    Code Block
    sudo netplan apply ping 8.8.8.8 Ctrl z

    

23. If everything is working correctly, the configuration is done. 

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