How to return the ability to connect via ssh from Windows 10 to Ubuntu (which is installed on virtualBox)?

Question

System administration

I used to connect via ssh from both WinSCP and cmd.
using the command ssh [email protected]

After creating ssh keys in Linux ( ssh-keygen ), the ability to connect via ssh disappeared.
Then, it seems, she completely deleted these keys using the rm -f .ssh/known_hosts command , but ssh access did not resume.

Answer 1

to connect with a password, the config on the machine with ubuntu must contain the openssh-server package
and be running

sudo apt reinstall openssh-server
sudo systemctl start sshd.service

in the config '/etc/ssh/sshd_config' the line must be active PasswordAuthentication yes
is disabled or ufw is configured, if it is, check
sudo ufw status