Rescuing home partition from ZFS, actually that doesn't really count since I did have to reinstall (was no longer booting), but recovering the Home partition from ZFS and to the other ext4 drive was much harder than it should've been and that's why I would never recommend people use ZFS.

My first home server would get lost on the network every week, at different times and without any apparent reason. I performed hard resets by unplugging and plugging it back in.

After several months, I decided to connect a screen to it, and I initially thought it had hung up, but it hadn't. After some investigation, I discovered that every time my router obtained a new dynamic IP address, the server lost its network connection, requiring a reset. I wrote a script to check the network connection every minute, and if it's lost again, it will be reset.

Hmm I have come up with a bunch of neat solutions over the years. Where to start?

One time I broke the sudoers file on a distro without a root account, thoroughly locking myself out. I used docker -v /:/chroot to get myself root access to my root filesystem where I fixed the sudoers file. Protip always use visudo

Fast data transmission via TCP over a lossy link.

I recently managed to recover from a corrupted libstdc .so. Turns out I shouldn't have bothered because the it was a Pi and, of course, the SD card had shit the bed, but I was pretty happy with myself for like 30 minutes.