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I think you should use nano for editing in console mode. Nano also supports highlight code like VIM, but you have to configure a bit. Nano have friendly and familiar shortcut keys than VIM which is...

Here is the simple code I wrote in 3 minutes to generate key automatically:

#!/usr/bin/expect

spawn /usr/bin/ssh-keygen

expect "Enter file in which to save the key" {send "\n"}
expect...

You can use Expect, which is very popular in many system.
I google here some stuff:

oreilly.com/catalog/expect/chapter/ch03.html
bash.cyberciti.biz/security/expect-ssh-login-script...

YES !

You CAN ssh from a a nologin account (such as daemon, apache, tomcat, ect..). The only thing you have to do is:
1 - Create global known_hosts file at /etc/ssh/ssh_known_hosts
2 - Change...