Key-Based Authentication -

[Bob Goodwin]

I've been reading the thread about detecting hack attempts and I am 
interested in in setting up "key based authentication" as described 
[perhaps] in 
"https://docs.fedoraproject.org/en-US/Fedora/14/html/Deployment_Guide/s2-ssh-..."

In doing this is their danger of making an error and locking myself out 
of my computer, if so what to avoid? I've made some catastrophic errors 
in the not very distant past that required a new system re-installation 
and would prefer not repeating that.

Suggestions, thoughts?

Bob