im new on linux, hi -- trisquel x ubuntu

See https://trisquel.info/en/wiki/installing-updating-and-removing-software

Trisquel's default install includes the Synaptic package manager too. It provides a finer control on the installed packages.

And here is a documentation to install the latest version of MATE desktop environment (from PPA): https://trisquel.info/en/wiki/installing-mate

Welcome! :D

I'm also from Brazil, and speak Brazilian Portuguese, of course.

I've been using Trisquel for about two or three years. And I'm staying
with it mainly because Trisquel **is** some thing that Ubuntu isn't:
free/libre as in freedom, not price.

I started studying the free/libre software movement, its philosophy, and
**true** goals since 2011. Since the end of 2015 have been a free/libre
software activist myself and have been trying to reignite the free/libre
software movement here (because 90% of the people that talk about it
here in Brazil don't speak out or don't set our goals as priority when
challenged).

Besides, feel free to ask anything related to Trisquel here. You can
also ask questions related to free/libre software movement in general,
but this place serves as support for Trisquel users, since there's a
specific mailing list for general discussion about free/libre software.
I'm also available to answer your questions privately, if you do want to
talk in Brazilian Portuguese instead.

Just ask us, even if you might already know the answer! It's better to
be well informed than misinformed. :D

By the way, you're using GNU+Linux Ubuntu, and I hope you'll be using
GNU+Linux Trisquel, not just "Linux Ubuntu" or "Linux Trisquel". :)

you will be disappointed because a kernel on its own is plain boring even when new, hehe
(welcome!)

Probably you wanted to say GNU, Linux it is a component of an operating system, Linux it is not an operating system itself, you can not use Linux, you use GNU, and GNU uses adopted kernel called Linux.