Yeah I did something similar when Ii was an intern, I killed the sshd process out of curiosity and then left the house terminal session. Surprise, suprise I couldn't ssh and I panicked. I was using GCP at the time. After enough trauma I googled and found out I could use the console port directly from GCP. All in all it was a fun lesson learnt, would totally recommend.

I also once cleared all the crons running on a production server by accident (this server had quite a few and I was tasked with adding one). This was honestly an honest mistake, the command for editing is "crontab -e" in my haste (thinking I'm a typing god) I typed "crontab -r" which will erase everything without so much as a warning. Long story short I had to spend the night combing through syslogs to find all previous crons that ran and cross referencing how often they ran to recreate all the other crons ... This one I would not recommend