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Linus Torvalds: Linux succeeded thanks to selfishness and trust

By Leo Kelion Technology reporter

Linux creator Linus Torvalds will find out later if he has won the Millennium

Technology Prize and an accompanying cheque for about 1m euros ($1.3m;

800,000) from the Technology Academy of Finland.

He has been nominated for the award in recognition of his creation of the

original Linux operating system and his continued work deciding what

modifications should be made to its kernel - the code that lets software and

hardware work together.

Today variants of the system power much of the world's computer servers,

set-top boxes, smartphones, tablets, network routers, PCs and supercomputers.

Ahead of the announcement Mr Torvalds gave a rare interview to the BBC.

When you posted about the original system kernel on Usenet in 1991 what did you

think would happen to it?

I think your question assumes a level of planning that simply didn't really

exist. It wasn't so much about me having any particular expectations of what

would happen when I made the original kernel sources available: a lot of the

impetus for releasing it was simply a kind of "hey, look at what I've done".

I was definitely not expecting people to help me with the project, but I was

hoping for some feedback about what I'd done, and looking for ideas of what

else people would think was a good idea.

The success of Linux is in large part due to its open source nature. Why do you

think people have been willing to give up so much time without financial

reward?

In many ways, I actually think the real idea of open source is for it to allow

everybody to be "selfish", not about trying to get everybody to contribute to

some common good.

Models hold up Android-based smartphones The Linux-based Android smartphone

system has spread the use of Mr Torvalds' invention

In other words, I do not see open source as some big goody-goody "let's all

sing kumbaya around the campfire and make the world a better place". No, open

source only really works if everybody is contributing for their own selfish

reasons.

Now, those selfish reasons by no means need to be about "financial reward",

though.

The early "selfish" reasons to do Linux tended to be centred about just the

pleasure of tinkering. That was why I did it - programming was my hobby -

passion, really - and learning how to control the hardware was my own selfish

goal. And it turned out that I was not all that alone in that.

Big universities with computer science departments had people who were

interested in the same kinds of things.

And most people like that may not be crazy enough to start writing their own

operating system from scratch, but there were certainly people around who found

this kind of tinkering with hardware interesting, and who were interested

enough to start playing around with the system and making suggestions on

improvements, and eventually even making those improvements themselves and

sending them back to me.

Start Quote

'Trust' is not about some kind of absolute neutrality, or anything like that,

but it's about a certain level of predictability and about knowing that you

won't be shafted

Linus Torvalds Creator of Linux

And the copyright protected those kinds of people. If you're a person who is

interested in operating systems, and you see this project that does this, you

don't want to get involved if you feel like your contributions would be somehow

"taken advantage of", but with the GPLv2 [licence], that simply was never an

issue.

The fundamental property of the GPLv2 is a very simple "tit-for-tat" model:

I'll give you my improvements, if you promise to give your improvements back.

It's a fundamentally fair licence, and you don't have to worry about somebody

else then coming along and taking advantage of your work.

And the thing that then seemed to surprise people, is that that notion of

"fairness" actually scales very well.

Sure, a lot of companies were initially fairly leery about a licence that they

weren't all that used to, and sometimes doubly so because some portions of the

free software camp had been very vocally anti-commercial and expected companies

to overnight turn everything into free software.

But really, the whole "tit-for-tat" model isn't just fair on an individual

scale, it's fair on a company scale, and it's fair on a global scale.

Once people and companies got over their hang-ups - renaming it "open source"

and just making it clear that this was not some kind of anti-commercial

endeavour definitely helped - things just kind of exploded.

And the thing is, if your competition doesn't put in the same kind of effort

that you do, then they can't reap the same kinds of rewards you can: if they

don't contribute, they don't get to control the direction of the project, and

they won't have the same kind of knowledge and understanding of it that you do.

Linus Torvalds sitting bellow penguin collection Mr Torvalds has built up a

collection of penguins - the official mascot of the Linux kernel

So there really are big advantages to being actively involved - you can't just

coast along on somebody else's work.

7,800 developers across 80 countries contributed to the last version of the

Linux kernel. But as it becomes more complex is there a danger it become less

accessible for new people to get involved?

So the kernel has definitely grown more complex, and certain core areas in

particular are things that a new developer should absolutely not expect to just

come in and start messing around with.

People get very nervous when somebody they don't see as having a solid track

record starts sending patches to core - and complex - code like the VM

subsystem.

So it's absolutely much harder to become a core developer today than it was 15

years ago.

At the same time, I do think it's pretty easy to get into kernel development if

you don't go for the most complex and central parts first. The fact that I do a

kernel release roughly every three months, and each of those releases generally

have over 1,000 people involved in it, says that we certainly aren't lacking

for contributors.

You have previously mentioned that you can't check that all the code that gets

submitted will work across all hardware - how big an issue is trust in an open

source project like this?

Oh, trust is the most important thing. And it's a two-way street.

Start Quote

I'm relieved that Microsoft seems to have at least to some degree stopped

seeing Linux as the enemy

Linus Torvalds Creator of Linux

It's not just that I can trust some sub-lieutenant to do the right thing, it's

that they in turn can trust me to be impartial and do the right thing.

We certainly don't always agree, and sometimes the arguments can get quite

heated, but at the end of the day, you may not even always like each other, if

you can at least trust that people aren't trying to screw you over.

And this trust issue is why I didn't want to ever work for a commercial Linux

company, for example.

I simply do not want people to have even the appearance of bias - I want people

to be able to trust that I'm impartial not only because they've seen me

maintain the kernel over the years, but because they know that I simply don't

have any incentives where I might want to support one Linux company over

another.

These days, I do work full-time on Linux, and I'm paid to do it, but that

didn't happen until I felt comfortable that there was a way that could be

pretty obviously neutral, through a industry non-profit that doesn't really

sell Linux itself.

And even then, in order to allay all fears, we actually made sure that my

contract explicitly says that my employment does not mean that the Linux

Foundation can tell me what to do.

So exactly because I think these kinds of trust issues are so important, I have

one of the oddest employment contracts you've ever heard of.

Chromebook Series 5 Google's Chromebook laptop comes preinstalled with its

Linux-based system

It's basically one paragraph talking about what I'm supposed to do - it

basically boils down to the fact that everything I do has to be open source -

and the rest of the contract is about all the ways that the company I work for

cannot influence me.

"Trust" is not about some kind of absolute neutrality, or anything like that,

but it's about a certain level of predictability and about knowing that you

won't be shafted.

Linux is popular in many areas of computing including smartphones and servers,

but it has never had quite the same breakthrough on desktops - do you think it

will ever happen?

So I think that in order to make it in a consumer market, you really do need to

be pre-installed. And as Android has shown, Linux really can be very much a

consumer product. So it's not that the consumer market itself would necessarily

be a fundamentally hard nut to crack, but the "you need to come preinstalled"

thing is a big thing.

And on the laptop and desktop market, we just haven't ever had any company

making that kind of play. And don't get me wrong - it's not an easy play to

make.

That said, I wouldn't dismiss it either. The whole "ubiquitous web browser"

thing has made that kind of consumer play be more realistic, and I think that

Google's Chrome push (Chromebox and Chromebooks) is clearly aiming towards

that.

So I'm still hopeful. For me, Linux on the desktop is where I started, and

Linux on the desktop is literally what I still use today primarily - although I

obviously do have other Linux devices, including an Android phone - so I'd

personally really love for it to take over in that market too.

But I guess that in the meantime I can't really complain about the successes in

other markets.

Raspberry Pi The budget-priced Raspberry Pi can run off an SD card loaded with

a Linux operating system

Steve Ballmer once described Linux as a "cancer", but in recent months we've

heard that Microsoft is running its Skype division off Linux boxes, and it's

now offering a Linux-based version of its Azure cloud service - does this give

you satisfaction?

Well, let's say that I'm relieved that Microsoft seems to have at least to some

degree stopped seeing Linux as the enemy. The whole "cancer" and "un-American"

thing was really pretty embarrassing.

The recent launch of the Raspberry Pi, running on Linux, has attracted a lot of

attention. Are you hopeful it will inspire another generation of programmers

who can contribute to the Linux kernel?

So I personally come from a "tinkering with computers" background, and yes, as

a result I find things like Raspberry Pi to be an important thing: trying to

make it possible for a wider group of people to tinker with computers and just

playing around.

And making the computers cheap enough that you really can not only afford the

hardware at a big scale, but perhaps more important, also "afford failure".

By that I mean that I suspect a lot of them will go to kids who play with them

a bit, but then decide that they just can't care.

But that's OK. If it's cheap enough, you can afford to have a lot of "don't

cares" if then every once in a while you end up triggering even a fairly rare

"do care" case.

So I actually think that if you make these kinds of platforms cheap enough -

really "throw-away cheap" in a sense - the fact that you can be wasteful can be

a good thing, if it means that you will reach a few kids you wouldn't otherwise

have reached.

You work from home - how hard is it to avoid being distracted by family life

and focusing on what must be very abstract concepts?

Oh, I'm sure it can be hard for some people. It's never been a problem for me.

Linus Torvalds in front of computers Mr Torvalds works on the Linux kernel in

his office at home in Oregon

I've always tended to find computers fascinating, often to the point where I

just go off and do my own thing and am not very social.

Having a family doesn't seem to have made that character trait really any

different.

I'll happily sit in front of the computer the whole day, and if the kids

distract me when I'm in the middle of something, a certain amount of cursing

might happen.

In other words: what could be seen as a socially debilitating failure of

character can certainly work to your advantage too.