I couldn't find the password for the PROXMOX node. The only available option is to reset the root password by following these steps:
1. Open the Proxmox VM console in PNETLab.
2. Reboot the virtual machine.
3. During boot, when the GRUB menu appears, press e.
4. Find the line starting with:
linux /boot/vmlinuz
5. Add the following at the end of that line:
init=/bin/bash
Example:
linux /boot/vmlinuz-6.x.x root=/dev/mapper/pve-root ro quiet init=/bin/bash
6. Press Ctrl + X or F10 to boot.
7. After booting, a shell prompt will appear.
8. Run the following command:
mount -o remount,rw /
9. Reset the password:
passwd root
10. Enter the new password twice.
11. After the password is successfully changed, run:
sync
12. Then reboot the system:
reboot -f
13. After reboot, login to the Web GUI:
https://IP-address:8006