Proxmox VE root pass reset (break the glass)

If you forgot the password, it is possible to change passowrd from the machine's console (physical access required):

Reset root password inside rescue shell:

Boot the server.

In GRUB find Proxmox VE GNU/Linux and press e to edit boot entry.

Config file will open, Find the line starting with linux (to load Linux kernel)

Add at the end of the that same line (not to the end of the file):

init=/bin/bash

Boot with

CTRL+X

Remount filesystem in read-write mode:

mount -o remount,rw /

Check the disk (optionally) to verify the disk is re-mounted:

df -hT

Change root's password:

passwd

Reboot

reboot -f

Login with new pass, usually to port 8006

https://nn.nn.nn.nn:8006/

and press [Login]

Change password (top-right, under username and 'Password')

Create admins user group

Create another admin user, add to admin user group created above

Define user's password

Add group permissions

Define permissions