getting started (2 replies)

I have an enormous amount of time on my hands due to health issues and am always looking for things to engage my mind. I am interested in learning how to do all this stuff (don't even know what you really call it) unlocking devices and installing linux on them to re-purpose them or add features.

Any suggestions on what to read to get started?

I have a few modems and routers I picked up at good will for $3 a piece so I think they would be a great place to start on as it wont cost a lot when I break them.

Thanks