The initial main goal of Linux (as a kernel) was as a hobby and for fun. Even today as a kernel and operating system family, it still predominantly targets hobbyists and enthusiasts in the consumer sector while in the enterprise industry it's gained a major following for being one of the most reliable Unix-like operating system families.
Yes, and this is actually its main goal. It is also Open-Source (which means that you can look at its code).
his main goal was to go to mars
his main goal was to help others
The main goal was the restoration of he Union.
The main goal of a Six Sigma implementation is continuous improvement.
The main goal was to preserve world peace.
It is the Home Directory.
Linux is, as you noted, an operating system. It is not a game so it does not have a main character. However, different distributions have different mascots. For example, the mascot for SUSE Linux is a lizard of some sort. The mascot for Linux in general is usually stated to be a penguin named Tux
Its the main goal.
jackie robinson's main goal was to work hard
The main goal of the Franciscans was to help the poor and serve as missionaries.
Scientific Linux is a Linux distribution. It is a free and open source operating system and aims to be as close to the commercial enterprise distribution as possible.