rmnologin in rc$.d

[Jimmy Johansson <jimmy@update.uu.se>]

Hi, I have recently installed Debian and I love it so far! I'm currently
trying to secure it as much as I can...

I'm reading debian-security-howto as I go along. I'm currently trying to
remove unneeded daemons from /etc/rc?.d/

My question is, do I need rmnologin, makedev or quotarpc? What are they
used for? I'm trying to learn things so I don't want to just disable them
without knowing! And by the way are anything of the above considered
insecure?

Thanks in advance!

/Jimmy