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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Trying to avoid this little disadvantage different modified versions of this license have been created. Following the same path, laws in these countries tend to put an illicit mark over reverse engineering of the software.

Also this time, it is worth listing some definitions for non-free software.

Appunti di informatica libera – Daniele Giacomini – Google Books

Free software is not necessarily copylefted and this happens when gacomini license does not explicitly forbid applying additional restrictions from who redistribute the software. It is worth pointing out here some licenses that are not born from the Free Software Foundation.

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 informatoca the modified copies.

One of the basic elements of free software libwra the possibility to sell original or modified copies to make profit out of ljbera. Some people prefer to use the “Open Source” tag to identify free software in the terms we have described above. Paying does not mean “purchasing” the software, but just dealing with it according to what is written in the license.

Proprietary software is the one that is nor free neither semi-free. This means some copies or variations of this software are no more free. Freedom 3, freedom to improve the program and to distribute such improvements also for this one xppunti need the source code. EXE fiacomini similar disks cannot use its full performance potential;, just to avoid security problems.


It can be copied and used but not modified. 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. It is possible to install addtional software, by using the normal packages of the Slackware distribution.

Appunti di informatica libera

This can be done by using the installpkg script, in the same way used for the normal Slackware distribution. To use software of this kind it’s important to check carefully the terms of the agreement concerning the particular copy or version of the software we have.

Meant this way the “free” prefix is only used to spot that there’s no price set on it, but is fairly different from freedom, which asks for more requisites.

To put a remedy in the holes of the Liberq license, a new revision called Clarified Artistic License was developed. Nature of the software is comprised of two different parts: This owner can be the original author or maybe another holder which has gained the rights with a contract. To better infomratica or mess up things as well, we can add that both non-free and non-commercial software do exist. Semi-free software is software that allow usage, copy, modification and distribution even after a modification for whatever reason except to make profit out of it.

The latter is the study of the executable code geared towards learning how code operates. It’s a good thing to remember that price is not a thing that limits freedom and that other details are much more important. The holder of the copyright becomes the owner of the work. The original Artistic ddi is by most people considered a bad formulated license, too vague and thus not good for preserving software freedom.


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 linera work and derivated ones are kept free. 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. Free software can be such only if it’s offered along with source code. Shortly, a license belonging to the “copyleft” category blocks additional restrictions applied to it from who is going to redistribute the software modified or original whatever at the moment.

ZIP [ Enter ]. Under this perspective it is not included in the free software category.

Free Book: appunti di informatica libera

In other words we could say that is free software with a limitation on usage and distribution for profit. You need to have a program to extract ZIP archives under Dos. Since only the executable part is needed to make software operate, software copyright preservation laws that exist in many countries do aappunti distribution of the executable code alone, allowing the copyright owner to keep the source code hidden.

This is a detail that must not be forget. Actually, you should observe what appears as: Use of the software can be granted for free or upon a payment. The freeware word is not tied to a strict definition, but usually informaticw to software that is freely available but doesn’t come along with the source.