CLI upgrade of OPNsense

Make possible for root user to login first (under System > Settigns > Administration)

Option A)

Option B)

As root, create a new sudoers file

vi /usr/local/etc/sudoers.d/anton
``

privileges

```bash

anton ALL=(ALL:ALL) NOPASSWD: ALL

Disable root direct login

Elevate priveleges

sudo su

Install tmux

pkg install tmux-3.8

Exit to normal user

exit

Verify that there is no attachable session and create first tmux session

tmux a
tmux

Elevate privileges

sudo su

Update process itself:

pkg update

pkg upgrade

opnsense-update