Connection is always refused by Ubuntu in a Virtual Machine (Hyper-V)

Hi, I'm new, I watched so many YouTube Tutorials but they just enter the IP address without explaining how did they get it.

Host name:
I tried to intentionally fake the IP address, for example 172.25.160.66 instead of 172.25.160.65 then the result is "Network error: Connection time out" instead of refused, which means that the IP address exists but just refused.

Username and password:
People say that the default username and password of Ubuntu are nothing, so I just type nothing for them.

WinSCP: Version 5.19.1 (Build 11552)

To zoom the image below, right click and image in new tab.

Step 1 - Enable connection
https://askubuntu.com/questions/890763/connection-to-ftp-always-refused

# Backup the current configuration file. (optional)
sudo mv /etc/vsftpd.conf /etc/vsftpd.backup
 
# Uninstall vsftpd and purge the configuration files.
sudo apt-get remove --purge vsftpd
 
# Lastly, re-install vsftpd.
sudo apt-get install vsftpd
 
# Test
ftp -p x.x.x.x

The default password for the user 'ubuntu' on Ubuntu is blank.

Step 2 - Permission to edit the file /etc/vsftpd.conf
https://askubuntu.com/questions/150028/you-are-not-the-owner-message-when-trying-to-access-folder

sudo chown -R username /path/to/directory

Example:
Step 3 - Enable writing
https://askubuntu.com/questions/410947/permission-denied-in-ftp-even-though-im-the-owner

In the file "/etc/vsftpd.conf", uncomment the line

#write_enable=YES

Important:
Watch this video how to change the file permission in Terminal instead of using a Text Editor:
https://www.youtube.com/watch?v=qpt5mxVVJoE

sudo su
vi /etc/vsftpd.conf
 
ESCAPE :wq (to exit)

Save the file and restart vsftpd with sudo service vsftpd restart

Hi,
first run this command in Linux
then on WinSCP use SFTP instead of FTP and set the port to 22.