For this tutorial, I'm assuming you have an apt-based package manager. (i.e. you use a Debian derivative, or an Ubuntu derivative) Simply because apt = good.
If you don't, I assume that there are the same packages for yum, but I can't test that. (Fedora doesn't like me)
Now, you must run a long and complicated thingymabober:
sudo apt-get install avrdude avr-libc gcc-avrsudo apt-get remove brltty
And yes, removing that package is safe. (Tip from here
) If it gives you an error saying its not installed, you're good, don't worry.