Why does Putty get the error "Network error: Connection refused"?

Question

SSH

Created a virtual machine on virtualbox with ubuntu 18.04.02 Got
to this point:

I'm trying to log in via ssh with the following parameters: An

error occurs:

In other SSH clients, an error also occurs: "connection not established because the destination computer rejected the connection request"

Answer 1

sudo apt install ssh
ssh server is not installed by default.
Also, try pinging the virtual machine. Even if it does not respond, then you need to pick the network settings in VirtualBox.