I'm on a corporate laptop dual booted with Ubuntu and Windows. Whenever I try to install things like Caddy, Docker Desktop, or really any application it turns into a whole thing and I can't install them. I'm also new to Linux so I don't understand the seemingly arbitrary strings of numbers and letters that represent files(?) in Ubuntu.
I've attempted to clear my caches, re-install certificates, use gpt instead of apt-key (apparently it's deprecated but still defaults to it?), etc. When I try to run 'apt update', any non-standard applications are ignored and I get errors back.
Edit: Here's the error I get for step one, doing an apt-get update
Ign:2 https://download.docker.com/linux/ubuntu jammy InReleaseIgn:2 https://download.docker.com/linux/ubuntu jammy InReleaseErr:2 https://download.docker.com/linux/ubuntu jammy InRelease Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification. [IP: 146.112.250.208 443]Fetched 2,054 kB in 8s (267 kB/s) Reading package lists... DoneW: Failed to fetch https://download.docker.com/linux/ubuntu/dists/jammy/InRelease Certificate verification failed: The certificate is NOT trusted. The certificate issuer is unknown. Could not handshake: Error in the certificate verification. [IP: 146.112.250.208 443]W: Some index files failed to download. They have been ignored, or old ones used instead.openssl s_client -connect download.docker.com:443