[Trisquel-users] Re : How does one release something under a free license,

[lcerf]

By explicitly stating what license apples to your work: a copyright notice in  
each file and a copy of the license distributed along the work.  For the  
details, see https://www.gnu.org/licenses/gpl-howto.html for the GNU licenses  
for software, https://www.gnu.org/licenses/fdl-howto.html for the GNU FDL,  
etc.