Linux booting from Android Phone LG Optimus Net L45C??
 

Hi guys- long time- no see!
Sorry, been away and now smart phones are everywhere!
I want to first Root my phone then if possible dual-boot the phone and a small linux distro
I have heard of Ubuntu for android but would rather do something like Slackware for Android??
Any help appreciated!
Happy to be back too :)

welcome back from whatever rock you've been hiding under!

first of all, android is an operating system, not a hardware platform.
so what you want is linux for your android-compatible device, right?
this is going to be very difficult.
there's no ready ditribution available.
there's been a few efforts, but even ubuntu phone is barely beta.

confusingly, it is possible to install e.g. debian onto an existing android install.

ARM architecture is used in most mobile devices these days, and that's what you should be searching for with your favorite distro.
imho, smart phones are very specific devices and once you get hardware compatibility you're still very far from an (everyday) usable phone.

i have experience with older android phones, and there the situation is even worse.

you might want to start with cyanogenmod, just to get your hands dirty. it's a rooted-by-default android variant.

check out xda-developers.com and their forums.
and f-droid.org