Upon logging into Webmin, I noticed I had lots of updates waiting, and a warning my boot partition was out of space. This wasn't the first time I encountered this exact issue, and I just deleted some files according to https://1reason.com/webhosting/ubuntu-ran-out-of-free-space-on-boot-drive-partition/
It seemed to go well. I had more space, and was able to install all the updates.
When I rebooted the system though, it didn't come back online. This server serves my CRM system, and it's stopped my company in its tracks.
I've tried using repairs etc.. and I was able to get the system to boot again, albeit it's as if it's a shell of a boot, without any of the "normal" abilities a server would have, much less the LAMP stack.
It appears I have the three partitions etc... as the link demonstrates to the best of my ability to understand the results.
More importantly, all the files I could use to transfer into a new system aren't able to be viewed (or more) due to permission restrictions.
I didn't actually think too much about it (other than the time wasted to transfer the files) because I have a daily backup using Duplicati. However, even though I tested the backup system using the same server, I didn't try migrating to a new server, and I'm over my head trying to recover.
It appears to be a relatively "easy" fix, but I'm at wits-end....
Any help is greatly appreciated. And, as someone who has generated millions of pageviews, I wouldn't mind writing a piece about the help received here too if it can help someone in return.