Do you have specific info on that Android tablet such as brand and model
number?

The ad only says Android OS and 4GB of memory.

Why not Google search to see if there's been any success by anyone? If it runs
on an ARM CPU there's a good chance it just might. Of course, you might start to
see if you can gain Root first, even a Kindle or Nook can run Linux, if memory
serves. Most likely Linux would be run off a USB or flash drive.

An android tablet is already running linux. It is what the operating
system is built on. The graphical interface is just built using something
similar to java, rather than the usual Xorg. There are not currently any
Android tablets that can plug and play with the default linux OSes that are
popular like ubuntu that I am aware of. The drivers are not present in
the kernel. There are sites like xda-developers . com that regularly
modify Ubuntu and debian to work on a specific tablet. But then you are
without security updates, etc.

There are some options that give a sort of dual boot, using chroot, to run
debian (there is an installer in the market) but it is sort of complicated
and buggy still...

I am not sure what you mean. Do you mean can you connect the tablet to a
Linux machine or to install Linux onto the Android or perhaps something
else? Answers to the first is yes. Second is maybe.

I was asking I guess if the 4GB was disk space or internal memory. I
think a cut down OS would run on 4GB of memory but that is not a lot
of space for OS and a lot of apps stored.

How things have changed. My first 'real' computer
had 50K of memory on DOS. I thought that was wonderful after
working in machine language.

I kinda had a feeling that it was probably a Linux product.

Canonical has a project called Ubuntu on Android. Depending of the specifics of
the tablet, that might work when it is ready.

There is also a project to port Ubuntu to the processor and video device used in
the UG802 and many other Android devices. It's not ready yet, might take three
months, might take two years.

www.in4dealz.com/.../Dual-Core-Mini-PC-UG802-Rockchip-3066-Android-4-0-\
4-1-2GHz-Cortex-A9-Quad-Core-GPU-1GB-RAM-4G-ROM-IPTV-TV-Box-600195/

The processor has a different architecture than the Intel and AMD chips used in
our PCs and laptops, so it's not an easy task. Once the OS is converted, the
applications also need to be converted -- so even if you were able to boot
Ubuntu, I wouldn't count on being able to run Libre Office, for example.

And yes, if one of the specs says 4 GB, that would be the storage device. It's
more like a flash drive than a hard disk.