Most programs suddenly won't launch

I’m new to linux.

Some programs throw this popup

Cannot mount AppImage, please check your FUSE setup.
You  might still be able to extract the contents of this app image....

Others don’t open, some work. I can’t see any relation between them.

This started after an exhausting run around trying to get pgAdmin to work, changing permissions, installing a frustrating amount of packages.

Restarting splays this error all across the screen on boot, but eventually restarts successfully after 2-3 min.
[FAILED] Failed to start CUPS scheduler

This might be related

[conner@conner-ms7c02 ~]$ sudo
sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set
[conner@conner-ms7c02 ~]$ 

Tell me how f***ed I am

Hi and welcome to the forum!

“…suddenly…” aka:

What AppImage exactly were you trying to run that cannot be replaced by apps from the official repos?

I’d say a clean install is in order - and regarding AppImages/FUSE I recommend reading this:

:man_shrugging:

Hey thanks for the reply. I can’t even boot to login today, so I’m going to be switching back to windows because I can’t risk this happening again at the moment.

With great freedom comes great responsibility, or something like that…

However… the errors come from changing permissions the wrong way, which makes the system unusable.

This is clear:

Also:

Fuse needs root premissions and if sudo does not work, then fuse will not work :man_shrugging:

End of story: If you don’t know what you actually changed, then you are f***** up.

Reinstall sudo:

$ su -
# pacman -Syu sudo