On 2 different occasions, I've made a mistake on my system(s) and when rebooted, I was left with single user/root prompt and nothing to use but ed. I've read the man page for ed a few times, but just can't "get it". Is there a cheatsheet somewhere that I can print?
I tried googling, but couldn't get a hit on what I was really after.
If/when I make another mistake like that, I want to be ready
Thanks.