What is Linux?

… a networking operating system build from the outset to be secure, robust and reliable. Linux runs on the top supercomputers, digital TVs, satnavs, smartphones, Internet severs and NASA’s helicopter on Mars.

Penguin with cake and balloons and inscription ‘Join us in celebrating 30 years of Linux 1991–2021
Tux turns 30

Apart from the fact that Linux did not crash, I was struck in 2000 by three things:

At this stage I was using a mixture of free and open source software and commercial software and it was not until I bought a laptop that could cope with the OpenOffice suite that I began exclusively to use free and open source software.

Linux differs from a number of other operating systems in several ways:

Security on Linux is most frequently compromised by user error or by security holes in software used to access the Internet. If a security hole is found in a key Linux component, it is normally fixed before most people are aware that it existed.

The Android operating system used on mobile ’phones and tablets has a Linux kernel and Java, rather than GNU, utilities.

I use Linux and its associated free and open source software for the same reasons as I used commercial software in the 1980s; it enables me to do things easily and to a high standard, it helps me to organise things the way I want and it doesn't waste my time.