Change root password via dialplan

I have a remote freepbx box that I do not know the root password to, but I have freepbx access. Is there a dialplan that I can write that I can use to change the root password?

Thanks

No. FreePBX and. Asterisk run as Asterisk user. They could never do such a thing.

Good Linux single user mode for how to reset your root password from your console.

I have tried using that, but when I hook up a screen the text is impossible to read it is all messed up. Any ideas for that?

Thank you

What exactly did you do? Did you reboot the pbx and got the grub screen? Did you edit the menu entries to get in single user?