The following instructions guide you through accessing your virtual machines without the need for an SSH key, utilizing the VNC console recovery mode.
1. In Hyperstack, go to the Virtual Machines tab and click on the virtual machines NAME you want to access, to view its details.
2. Within the VM's details, click Open VNC Console.
3. To access the grub menu, click the "Send CtrlAltDel" command (found at the top right of the console), and then click on the black console window while holding the Shift key.
4. Select Advanced options > Recovery mode from the grub menu.
5. Use arrow keys to navigate to the menu option labeled root, and press Enter (it may appear distorted due to console messages, this is expected).
6. Root access to the system will be granted, allowing you to carry out administrative tasks.
How to reset your Ubuntu password:
a. Send the "passwd" command.
b. Enter your new password twice.
7. Execute the "reboot now" command to restart the virtual machine, and the system changes will take effect.
Now, with root privileges, you can access and manage your virtual machine without needing your SSH key.