I am running Vagrant on Windows with Virtualbox. I have a vagrant base box of Ubuntu 14.04. I tried to upgrade it to 16.04 via ssh.
After the upgrade, it requires to restart. Either picking yes or no, I cannot ssh back into the VM, showing
ssh_exchange_identification: read: Connection reset
I have opened a backup port at 1022 as per instructions in the upgrade but that connection was refused as well.
How can I connect back to VM to complete the upgrade process?
edit: I have not set any ssh instructions in Vagrantfile. Also, I realize there is a base box for 16.04 (xenial64) but I want to familiarize myself with handling servers from the terminal.