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Title, Appunti di informatica libera. Author, Daniele Giacomini. Publisher, Systems Comunicazioni, ISBN, , Length, Appunti di informatica libera by Daniele Giacomini at – ISBN – ISBN – Systems Comunicazioni – Softcover. which makes available automatically a swap file for the virtual memory. Appunti di informatica libera Copyright © Daniele Giacomini.

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This owner can be the original author or maybe another holder which has gained the rights with a contract. The latter is the study of the executable code geared towards learning how code operates.

The word copyleft is an invention and represents the copyright of who, while defending his rights as the author, wants to defend freedom of his work, imposing that the original version of his work and derivated ones are kept free. Even if this concept doesn’t create any problem for software usage, it is not convenient to adopt this license if you don’t have such a need.

Appunti di informatica libera

Actually, you should observe what appears as: Since only the executable part is needed to make software operate, software copyright preservation laws that exist in many countries do permit distribution of the executable code alone, allowing the copyright owner to keep the source code hidden. Shortly, a license belonging to the “copyleft” category liberaa additional restrictions applied to it from who is going to redistribute the software modified or original whatever at the moment.

On its own this software it’s free, but since it has no copyright it doesn’t have a license either, so anybody liberra free to do whatever he wants with it, even take ownership of the rights. Unfortunately, a neat definition for this license does not exist and people tend to simply name them BSD licenses, feeding confusion that should be better to avoid. Software is a code protected from copyright laws, similarly to what happens for literary works.

The holder of the copyright becomes the owner of the work. Finally, ZipSlack can be used also when there is a reduced amount of central memory, by activating the virtual memory with the support of a file.

«a2», ex «Appunti di informatica libera», ex «Appunti Linux»

According to the various classifications explained in this chapter, commercial software is such, only because it’s sold for profit.

Under this perspective it is not included in the free software category.


Proprietary appuni is the one that is nor free neither semi-free. This means some copies or variations of this software are no more free. Appunti di informatica libera The reason is that this kind of installation is not very efficient and presents risks: With the shareware word we refer to proprietary software that you are required to buy after a trial period even if it can be freely distributed. Free software is such if it does allow usage by everybody, copy and distribution of it, both in its original form and its modifications, for free or even by selling it.

However there are netconfig to informtaica the network interface and pppconfig to libers a PPP connection over a switched line. Nature of the software is comprised of two different parts: The first one is human readable, while the second one is suited for machine execution and not for reading.

To use software of this kind it’s important to check aappunti the terms of the agreement concerning the particular copy or version of the software we have.

This is a detail that must not be forget. This can be done by using the installpkg script, in the same way used for the normal Slackware distribution.

Programming Tips and Tricks: Appunti di Informatica Libera [pdf]

The freeware word is not tied to a strict definition, but usually refers to software that is freely available but doesn’t come along with the source. This way, the patent doesn’t allow the use of the algorithm or protected idea without an explicit authorisation from the owner of the copyright. Semi-free software is software that allow usage, copy, infogmatica and distribution even after a modification for whatever reason except to make profit out of it. It’s a good thing to remember that price is not a thing that limits freedom and that other details are much more important.

Appunt you do not have this possibility, Info-ZIP can be found at: You alpunti to have a program to extract ZIP archives under Dos. The original Artistic license is by most people considered a bad formulated license, too vague and thus not good for preserving software freedom.

Following the same path, laws in these countries tend to put an illicit mark over reverse engineering of the software. There’s too much confusion around the BSD acronym, too giacominii licenses similar to the Berkeley one are released under its name. Meant this way the “free” prefix is only used to spot that there’s no price set on it, but is fairly unformatica from freedom, which asks for more requisites. To this extent someone said: In many countries you may also be able to patent algorithms and other concepts tied to software.


ZIP [ Enter ]. In other words we could say that is free software with a limitation on usage and distribution for profit. To put a remedy in the holes of the Artistic license, a new revision called Clarified Artistic License was developed. It’s important to note that “freedom” of free software is not in the price – which can also be requested for the distribution service – but the possibility to use it without restrictions, to copy it as many times as you want, to distribute it and to modify it and even distribute the modified copies.

Appunti di informatica libera Usually, the contract that rules the use of software is the license ; is always important to know deeply the terms of the license agreement for the software you intend to deal with. Public domain software is software without copyright. To better understand or mess up things as well, we can add that both non-free and non-commercial software do exist.

Software always has an owner, except for public domain software which is covered later in this bookwhich is such because he “owns the copyright “. Freedom 3, freedom to improve the program and to distribute such improvements also for this one we need the source code.

Also this time, it is worth informaticw some definitions for non-free software. Following this subtle difference it is important to spot out the difference of proprietary software from commercial software because they’re not the same thing.

It is possible to install addtional software, by using the normal packages of the Slackware distribution. Freedom 1, freedom to study and learn how the program operates and the ability to modify it to best suit your own needs in such a case source code is needed.

The result should be a C: Paying does not mean “purchasing” the software, but just dealing with it according to what is written in the license.