What is the advantage of the Unix/Linux system compared to other operating systems?

Is there a advantage of a Unix/Linux system compared to other operating systems? That is, its structure and ability for large systems such as the ware house or mega databases?

What is the advantage of the Unix/Linux system compared to other operating systems?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).