Oracle Cloud has no public key/private key/SSH KEY, and cannot log into VPS

Oracle Cloud's free VPS is actually pretty good. Here's how to fix the problem of not being able to log into the VPS without a public key/private key/SSH KEY.

1. On the free VPS that cannot access the system, shut down and detach the boot volume

2. Create a new VPS and add the boot volume separated above

Don't select ISCSI below, select PARAVIRTUALIZED

3. Log in to the newly opened VPS. It is best to restart it and use the root user

 sudo -i

Check if the hard disk is mounted

 fdisk -l

Then, copy the entire hard drive to the non-bootable disk

 dd if=/dev/sda of=/dev/sdb

It takes a long time, probably about 2 hours.

To prevent network problems, you can use screen -S copy so that you don't have to worry about SSH being interrupted.

4. On the new machine, separate the boot disk

5. Go to the VPS that cannot be turned on and mount the boot disk

In this way, you can have fun playing the machine.

Reference: https://www.hostloc.com/thread-593802-1-2.html, https://www.hostloc.com/thread-593924-1-1.html