SSH quiz

Ten questions across the whole chapter. Each answer explains why. Aim for eight before moving on to chapter 11.

What does the "Are you sure you want to continue connecting?" prompt ask you to verify?
Which pair of files makes a key login work?
What permissions must ~/.ssh and authorized_keys have?
Which command copies a directory tree to a server, sending only changes next time?
How do you give a host a short name with its user and key?
Where do you put a hardening change for sshd?
Which command checks the configuration syntax?
After editing the sshd configuration, you should ...
A host key changed because the server was rebuilt. How do you update your known_hosts?
Which setting stops password guessing completely?