Hello! Ever since I installed certbot (I just followed the install instructions because I don't understand the code), my server keeps telling me I have nodes 100% full. I don't know which things can be removed and which cannot if I want to keep my ssl certificates and keep them up to date, but this is annoying me that it's taking up so much space...
That was why the screenshot of 100% capacity loopback devices was included.
@amandapiasta those loopback volumes are not going to pose any problem being "full". They are essentually image files that contain a file system that houses a snap app. They are stored on your promary volume /dev/sda1. Your system will not be using them as storage. You can think of them like a CD-ROM and safely ignore them when viewing disk capacity and utilization.
This error message could have nothing to do with Certbot at all and perhaps (probably) those "100% used" from your screenshot for the loop devices (which already explained is as expected) is just a red herring.
We really need the (entire) context of the "100% nodes full" error message.
Notices about that for the loop devices mounted in /var/lib/snapd/ directory can safely be ignored. In fact, it would be a BAD thing if those snap loop devices weren't 100% full, as that would otherwise mean perfectly fine disk space would be wasted, as it would never be used anyway. So to NOT waste any space, the images which are mounted with those loop devices are "cropped" to the actual size used inside the image.