I tried to install Arduino IDE software through 'Software'-named software in ubuntu. It failed with message 'authentication was required'. I think Linux is free software. Why I need to register? Who collect that information and what purpose? Then I tried to register and it was successfull but this stupidly named 'Software'-software does not accept my password. Why? Why I need to register for free software? I have been used Ubuntu for years and not never before needed to register anywhere. How I can break that software registration so that I can again freely use Ubuntu?
And, why this forum forces to use tags on this post? And then it does not allow tags like 'install', 'software' or 'ubuntu-should-be-free'... First I tried to post question to ubuntu forum, but it was read only! What sense is that?