Edit: I figured it out. “reload ssh” doesn’t work, but “sudo service ssh restart” does. Carry on!
I followed the instructions here, and now my /etc/ssh/sshd_config looks like this (in the relevant section):
# Authentication: LoginGraceTime 120 PermitRootLogin without-password StrictModes yes
However, I’m still able to log in as root with my password, even from another machine. Note, when I enter the command “reload ssh”, I get the following error message:
reload: Name "com.ubuntu.Upstart" does not exist
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