Trisquel 10 aka Nabia Is Available

First, install the latest version of debootstrap.

$ sudo apt update
$ sudo apt install debootstrap

Check to see if the file "/usr/share/debootstrap/scripts/nabia" exists. If not, that means that etiona's version of debootstrap has not been updated to be aware that there is a release called nabia, in which case you'll need to create that script yourself. It can just be a symlink to the script for etiona. If the file already exists, you can skip this step:

$ ln -s /usr/share/debootstrap/scripts/nabia etiona

Then run

$ sudo debootstrap nabia nabia-chroot

That will install nabia to a directory called "nabia-chroot" in your current working directory.

Then run

$ ls nabia-chroot

to list the contents of that directory. You should see subdirectories like "bin", "etc", and "usr", just like if you were to run "ls /". That's because this directory contains a minimal Trisquel nabia system. Now let's take it for a test drive. Run

$ sudo chroot nabia-chroot

to chroot into that directory. Notice that the shell prompt changes. It will now say "root" instead of your username, "/" instead of whatever directory you were in, and "#" instead of "$". That's because you are now inside the nabia installation, running commands as root.

You can play around for a bit and run some commands. There won't be much you can do yet. When you're done, either press Ctrl+D or run

$ exit

to leave the chroot. If you aren't going to use it again, delete it.

$ sudo rm nabia-chroot

If you wanted to actually install nabia to disk, you could dual boot by mounting a spare partition and debootstrapping onto that. If you wanted to replace etiona with nabia, you could boot into a live USB, mount the root partition on your hard drive, and debootstrap onto that. (That's essentially what is happening when you use Trisquel's netinstaller.) However, you probably don't want to do this yet, unless you are interested in contributing to Trisquel development.