Linux vs Unix

The words Linux and Unix are used interchangeably by many in technology but what’s the real difference between the two?

These are 2 different types of operating system:

1. Linux: is free and open source. Examples of Linux operating systems are Ubuntu, Red Hat, Mint etc.
2. Unix: is a proprietary and usually costs a lot. Examples include Solaris made by Sun (bought by Oracle), AIX by IBM and HP-UX by you guessed it HP