WARNING - DO NOT RUN THE MENTIONED COMMAND
So it seems I did something pretty dumb here to put it mildly. I was attempting to change the permissions for a few files in a directory that all started with . to read/write for sudo/root only.
My attempt at changing several files at once seems to have done something pretty horribly global. While inside a directory (wasn't at root dir) I ran sudo chmod 600 .* and well, I'm posting this from my phone now... I still have the terminal window open at the moment, but I'm quite sure if the laptop goes to sleep I'm completely done. Hilariously that means there is a slight urgency to this question.
Oh and this seems to have changed permissions damn near everywhere I'm guessing. I can't even run the ls or cd .. commands. An attempt of cd /home/brian or cd ~ give the error bash: cd: /home/brian: Permission Denied and any attempt at a sudo command just says bash: /usr/bin/sudo: Permission Denied
I am afraid of rebooting, no clue if there is any built in recover from something this dumb, but figured I would try to ask here before making things any worse. I'm a pretty new Linux as my main OS convert and been advocating for it a bit lately, but ouch, this one stings a bit. Any thoughts of things to try would be immensely appreciated.
EDIT: I wanted to provide clarification on how/where this command was executed. This was executed from /.atx $, just an arbitrary directory, but more details below.
While logged in as my regular username brian, I had a terminal open to /.atx that contained three config type text only files. Each filename started with a .. That directory/name/the files aren't any part of a common package, just an arbitrary set of configs I was programmatically moving around. Files contained some SQL server connection string info and just wanted them semi-obscured.