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|Developer||Aaron Griffin and others[a]|
|Source model||Open source|
|Initial release||11 March 2002|
|Latest release||Rolling release / installation medium 2019.06.01|
|Marketing target||General purpose|
|Kernel type||Monolithic (Linux)|
|Default user interface||CLI|
|License||Free software (GPL and other licenses)|
The design approach of the development team follows the KISS principle ("keep it simple, stupid") as the general guideline, and focuses on elegance, code correctness, minimalism and simplicity, and expects the user to be willing to make some effort to understand the system's operation. A package manager written specifically for Arch Linux, pacman, is used to install, remove and update software packages.
Arch Linux uses a rolling release model, such that a regular system update is all that is needed to obtain the latest Arch software; the installation images released by the Arch team are simply up-to-date snapshots of the main system components.
- 1 History
- 2 Design and principles
- 3 Installation
- 4 Package management
- 5 Derivatives
- 6 Versions
- 7 Reception
- 8 See also
- 9 Notes
- 10 References
- 11 External links
Inspired by CRUX, another minimalist distribution, Judd Vinet started the Arch Linux project in March 2002. Originally only for 32-bit x86 CPUs, the first x86_64 installation ISO was released in April 2006.
Vinet led Arch Linux until 1 October 2007, when he stepped down due to lack of time, transferring control of the project to Aaron Griffin.
The end of i686 support was announced in January 2017, with the February 2017 ISO being the last one including i686 and making the architecture unsupported in November 2017.. Since then, the community derivative Arch Linux 32 can be used for i686 hardware.
Until pacman version 4.0.0 Arch Linux's package manager lacked support for signed packages. Packages and metadata were not verified for authenticity by pacman during the download-install process. Without package authentication checking, tampered-with or malicious repository mirrors can compromise the integrity of a system. Pacman 4 allowed verification of the package database and packages, but it was disabled by default. In November 2011 package signing became mandatory for new package builds, and as of 21 March 2012 every official package is signed.
Design and principles
Arch is largely based around binary packages. Packages target x86-64 microprocessors to assist performance on modern hardware. A ports/ebuild-like system is also provided for automated source compilation, known as the Arch Build System.
Arch Linux focuses on simplicity of design, meaning that the main focus involves creating an environment that is straightforward and relatively easy for the user to understand directly, rather than providing polished point-and-click style management tools — the package manager, for example, does not have an official graphical front-end. This is largely achieved by encouraging the use of succinctly commented, clean configuration files that are arranged for quick access and editing. This has earned it a reputation as a distribution for "intermediate and advanced Linux users who aren't afraid of the command line".
Relying on complex tools to manage and build your system is going to hurt the end users. [...] "If you try to hide the complexity of the system, you'll end up with a more complex system". Layers of abstraction that serve to hide internals are never a good thing. Instead, the internals should be designed in a way such that they NEED no hiding.— Aaron Griffin
The Arch Linux website supplies ISO images that can be run from CD or USB. After a user partitions and formats their drive, a simple command line script (pacstrap) is used to install the base system. The installation of additional packages which are not part of the base system (for example, desktop environments), can be done with either pacstrap, or pacman after booting (or chrooting) into the new installation.
An alternative to using CD or USB images for installation is to use the static version of the package manager pacman, from within another Linux-based operating system. The user can mount their newly formatted drive partition, and use pacstrap (or pacman with the appropriate command-line switch) to install base and additional packages with the mountpoint of the destination device as the root for its operations. This method is useful when installing Arch Linux onto USB flash drives, or onto a temporarily mounted device which belongs to another system.
Regardless of the selected installation type, further actions need to be taken before the new system is ready for use, most notably by installing a bootloader, creating an initramfs, and configuring the new system.
Arch Linux's only supported binary platform is x86_64. The Arch package repositories and User Repository (AUR) contain 58,000 binary and source packages, which comes close to Debian Linux's 68,000 packages; however, the two distributions' approaches to packaging differ, making direct comparisons difficult. For example, six out of Arch's 58,000 packages comprise the software Abiword, of which three in the user repository replace the canonical Abiword package with an alternative build type or version (such as sourcing from the latest commit to Abiword's source control repository), whereas Debian installs a single version of Abiword across seven packages. The Arch User Repository also contains a writerperfect package which installs several document format converters, while Debian provides each of the more than 20 converters in its own subpackage.
To facilitate regular package changes, pacman (The Arch Package Manager, acronym over "package manager") was developed by Judd Vinet to provide Arch with its own package manager able to track dependencies. It is written in C.
All packages are managed using the pacman package manager. Pacman handles package installation, upgrades, removal, and downgrades, and features automatic dependency resolution. The packages for Arch Linux are obtained from the Arch Linux package tree and are compiled for the x86-64 architecture. It uses binary packages in the
tar.xz format, with
.pkg placed before this to indicate that it is a pacman package (giving
The following official binary repositories exist:
- core, which contains all the packages needed to set up a base system
- extra, which holds packages not required for the base system, including desktop environments and programs
- community, which contains packages built and voted on by the community; includes packages that have sufficient votes and have been adopted by a "trusted user".
- multilib, a centralized repository for x86-64 users to more readily support 32-bit applications in a 64-bit environment.
Additionally there are testing repositories which include binary package candidates for other repositories. Currently, the following testing repositories exist:
- testing, with packages for core and extra.
- community-testing, with packages for community.
- multilib-testing, with packages for multilib.
The staging and community-staging repositories are used for some rebuilds to avoid broken packages in testing.
There are also two other repositories that include the newest version of certain desktop environments.
- gnome-unstable, which contains packages of a new version of software from GNOME before being released into testing.
- kde-unstable, which contains packages of a new version of KDE software before being released into testing.
The unstable repository was dropped in July 2008 and most of the packages moved to other repositories. In addition to the official repositories, there are a number of unofficial user repositories.
The most well-known unofficial repository is the Arch User Repository, or AUR, hosted on the Arch Linux site. However, the AUR does not host binary packages, hosting instead a collection of build scripts known as PKGBUILDs.
Arch Build System (ABS)
The Arch Build System (ABS) is a ports-like source packaging system that compiles source tarballs into binary packages, which are installed via pacman. The Arch Build System provides a directory tree of shell scripts, called PKGBUILDs, that enable any and all official Arch packages to be customized and compiled. Rebuilding the entire system using modified compiler flags is also supported by the Arch Build System. The Arch Build System
makepkg tool can be used to create custom
pkg.tar.xz packages from third-party sources. The resulting packages are also installable and trackable via pacman.
Arch User Repository (AUR)
In addition to the repositories, the Arch User Repository (AUR) provides user-made PKGBUILD scripts for packages not included in the repositories. These PKGBUILD scripts simplify building from source by explicitly listing and checking for dependencies and configuring the install to match the Arch architecture. Arch User Repository helper programs can further streamline the downloading of PKGBUILD scripts and associated building process. However, this comes at the cost of executing PKGBUILDs not validated by a trusted person; as a result, Arch developers have stated that the utilities for automatic finding, downloading and executing of PKGBUILDs will never be included in the official repositories.
Users can create packages compatible with pacman using the Arch Build System and custom PKGBUILD scripts. This functionality has helped support the Arch User Repository, which consists of user contributed packages to supplement the official repositories.
The Arch User Repository provides the community with packages that are not included in the repositories. Reasons include:
- Licensing issues: software that cannot be redistributed, but is free to use, can be included in the Arch User Repository since all that is hosted by the Arch Linux website is a shell script that downloads the actual software from elsewhere. Examples include proprietary freeware such as Google Earth and RealPlayer.
- Modified official packages: the Arch User Repository also contains many variations on the official packaging as well as beta versions of software that is contained within the repositories as stable releases.
- Rarity of the software: rarely used programs have not been added to the official repositories (yet).
- Betas or "nightly" versions of software which are very new and thus unstable. Examples include the "firefox-nightly" package, which gives new daily builds of the Firefox web browser.
PKGBUILDs for any software can be contributed by ordinary users and any PKGBUILD that is not confined to the Arch User Repository for policy reasons can be voted into the community repositories.
There are multiple distributions which either build on top of Arch Linux or are based on its repositories. Notable derivatives include:
|Name||Kernel||Hardware arch||Default userland||Descriptions|
|Antergos||Generic Linux kernel||x64||GNOME||a discontinued successor of Cinnarch that offered a graphical installer; used the stock Arch Linux repositories along its own.|
|Arch Hurd||GNU Hurd||i686 (32-bit x86)||Text mode||An Arch derivative using a different kernel, GNU Hurd.|
|Arch Linux 32||Generic Linux kernel||i686 (32-bit x86)||Text mode||A community-supported continuation of Arch Linux for 32-bit only CPUs. Created in 2017 when official support for i686 was discontinued in November 2017.|
|Arch Linux ARM||Generic Linux kernel||ARM||Text mode||An Arch Linux derivative that tries to port the distribution to many ARM computers, originated from the developers at ArchMobile and PlugApps. It has been ported to some ARMv5, ARMv6, ARMv7 and ARMv8 devices, such as BeagleBoard, CuBox-i, PandaBoard, Raspberry Pi, and TrimSlice|
|ArchBang||Generic Linux kernel||x64||Openbox||A variant that uses Openbox as the desktop environment and emphasizes speed; uses the stock Arch Linux repositories.|
|ArchLabs Linux||Generic Linux kernel||x64||Openbox||A variant that uses Openbox as the desktop environment. Emphasis on speed and easy installation of Arch Linux. Uses the stock Arch Linux repositories and the AUR as well as their own ArchLabs repository.|
|Chakra Linux||Generic Linux kernel||x64||Qt||Originally derived from Arch Linux, with the latest KDE. For now uses the pacman utility for package management. Strives to be Qt-only.|
|LinHES||Generic Linux kernel||x64||Enlightenment||Linux Home Entertainment Server, Designed for use on home theater PCs (HTPCs), providing applications for recording TV and acting as a sound and video center|
|Manjaro Linux||Generic Linux kernel||x64||Xfce, Plasma 5, GNOME||An Arch Linux-based distribution with a graphical installer, additional GUI tools for package management and system tuning; provides many preconfigured popular desktop environments; updates from own package repository that is delayed for stability reasons.|
|PacBSD||BSD||x64||Text mode||a FreeBSD derivative, which builds on top of the package system of Arch Linux|
|Parabola||Linux-libre||x64, ARMv7||MATE||An Arch community-driven distribution that is fully conformant with the GNU Free System Distribution Guidelines, uses the Linux-libre kernel and excludes blobs including firmware normally found in Arch|
Arch Linux does not schedule releases for specific dates but uses a "rolling release" system where new packages are provided throughout the day. Its package management allows users to easily keep systems updated.
Monthly updated ISO installation images are released on every first week of a month. They contain the latest software from the stable repositories and stay unchanged until the following month. In most cases, older versions of the installation image may be used to install Arch Linux. Since the software is downloaded over the internet, a fresh installation always contains the newest software, although an update to the keys may be necessary in order to verify the software.
Occasionally, manual interventions are required for certain updates, with instructions posted on the news section of the Arch Linux website.
There are several projects working on porting the Arch Linux ideas and tools to other kernels, including PacBSD (formerly ArchBSD) and Arch Hurd, which are based on the FreeBSD and GNU Hurd kernels respectively. There is also the Arch Linux ARM project, which aims to port Arch Linux to ARM-based devices, including the Raspberry Pi, as well as the Arch Linux 32 project, which continues support for systems with 32-bit only CPUs after the mainline Arch Linux project dropped support for the architecture in November 2017.
OSNews reviewed Arch Linux in 2002:
In closing I just wanted to ask all you who would be interested to help this project because they have a only have SMALL selection of packages and if they could get more they would be very popular IMHO.
Arch Linux is a clean, powerful distribution. Apart from the two package management utilities of pacman and pkgbuild, the developers have resisted any temptation to implement package customizations or add new utilities. As such, the system requires a fair amount of post-install tweaking to bring it to a usable level. Security updates are handled in a style of FreeBSD's ports of constantly updating packages to their latest versions. This may occasionally break the system, but problems are usually fixed in a reasonably short time. One area where Arch Linux trails behind Gentoo is documentation; except for the two man pages for pacman and pkgbuild, the installation manual and a sparse wiki, there is little else to guide novice users to configure their Arch Linux system. On the other hand, the distribution has active user forums and mailing lists, as well as several international community sites in German, Italian and Polish.
Tux Machines reviewed Arch Linux in 2007:
I think Arch's most significant strong point is in the fact that it's so customizable. Unlike some distros that install everything or offer rigid defaults, one installs just what they need and want with Arch. With the surprisingly complete repos, one can install how little or much software they choose. With the trend in Linux these days of making things so easy for the newcomer, sometimes one loses most of the choices once offered. So, Arch Linux is a refreshing change of pace. What user configurations are needed are not complicated and sane defaults or useful real-world examples are offered for most. All my hardware was auto-detected, so no configuration was needed in that area. My only complaint is I'm going to have to do some more work on the fonts. Whereas the fonts aren't what one might classify as ugly, they aren't as pretty as on some systems. I would also suggest they dress-up KDE a bit more.
Chris Smart from DistroWatch Weekly wrote a review about Arch Linux in January 2009:
The "keep it simple" philosophy of Arch Linux really shines through in all aspects of this distribution. It lets the user control the system and doesn't do anything unless told to. It has the speed and convenience of binary with the power of source and is very flexible when it comes to optional dependencies. Being a rolling release, the packages are also reasonably up-to-date. Other than the problem with the Intel video driver, I have not had any issues with the quality of the packages. Still, I have to wonder how well a smaller distribution like this can provide overall stability. Perhaps time will tell. It also remains to be seen how well Pacman will perform after installing and removing thousands of packages. Certainly, Arch Linux isn't for everybody, no distribution is, but it sure is plenty of fun and you learn a lot. If you're the kind of person who likes to fiddle and tweak your system, then definitely give it a shot. Once you have your system up and running the way you want, it's very easy to maintain and it feels great. If you've been tempted to try it out, there is a Wiki page listing how it compares to others. As for my dream distribution, Arch Linux comes pretty darn close.
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