Setting up DNS

[Lionofgod]

Hello
I've set up my server, have apache running on ubuntu Server 12.04 LTS.
Have no idea how to integrate Django, Python and SqLite3 with Apache, but I think I'll manage to figure that out...
Question is, I want to create a blog that is accessible by everyone.
Apparently I need a DNS? Those guys will give me a domain name that I can assign to my server and then my server will be available on the world wide web.
Assuming I manage to set up the server properly, with Django and everything.
I would have to buy a domain and enter its name into the config file?
Does anyone know of a decent, cheap DNS provider?
Should I get a DNS through my ISP (Do ISP's provide DNS)?

[Z3R0]

Look into getting a no-ip.com, dyn.com, or dnsdynamic.com account. All of these are free dynamic dns providers. So, basically:
1) Set up your server with whatever services you desire
2) Open an account with one of those sites
3) Read the instructions on how to set everything with the relative site
4) Confirm with your ISP that your IP is accessible from the internet/is not behind a firewall
5) Ideally, should be good to go

There will most likely be a lot more steps you will have to be involved with, but these 5 are a general outline of what you have to do for what you want to accomplish. Hosting from your computer is a rewarding experience, but I really wouldn't recommend it if you don't know what you're doing as far as security, uptime, configuration management, and user support go. That's not to mention purchasing/renewal fee's if you want a FQDN.

[Lionofgod]

Okay, thank you, that makes sense.
I hope I will be able to learn about the security aspect as I go through the process