How do I reinstall 12.04?

[JSF16]

How do I re install 12.04 after updating to 12.10?

[BertN45]

From scratch, you cannot undo the 12.10 install.

[JSF16]

Yes, cleary. How do I do this however? To be honest, I'm unsure if I have 12.04 or 12.10 installed. Terminal tells me 12.10, but my the text on the wallpaper of the login screen says 12.04

Now I have the disc I used to install ubuntu 12.04 the first time. Can I use this to reinstall 12.04 from scratch on 12.10 or 12.04? How?

[monkeybrain2012]

Yes, cleary. How do I do this however? To be honest, I'm unsure if I have 12.04 or 12.10 installed. Terminal tells me 12.10, but my the text on the wallpaper of the login screen says 12.04

In the terminal type

lsb_release -a

It will tell you the installed version.

Yes, you can use the same disc to reinstall.

[newb85]

Boot from that disc and run the installer. It should recognize your Ubuntu install, and will probably give you an automatic option fitting what you want.