During his presentation the 05th of May in my school Polytech'Nice-Sophia, Richard Stalman argue about the fact that people are wrongly calling "Linux", the OS he helped to create, instead of
Gnu/Linux.
He thinks that people have forgotten that at the beginning, the free OS project was part of the Gnu Project that he leaded with other people during more than 10 years.
After more than a decade of work, they created the envelope of the free OS, i mean all necessary softwares or components, but they couldn't manage to successfully create
the kernel.
So when Linus Torvals designed the kernel, the system was ready to be deployed, and he release "his" OS, which he gave his name to, under a non-free license, forgetting about the
previous work completed by the GNU foundation.
He lightly changed his mind few times after, by publishing the OS under a free license, but the name remained, until then.
In conclusion, call the system GNU/LINUX, and not LINUX.