Alpine Linux

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Alpine Linux
Alpine Linux.svg
Developer Alpine Linux development team
OS family Unix-like
Working state Active
Source model Open source
Latest release 3.2.2 / 14 July 2015; 48 days ago (2015-07-14)[1]
Marketing target Developers, power users
Available in Multilingual
Package manager APK
Platforms x86, x86-64, ARMhf
Kernel type Monolithic (Linux)
Userland Busybox (GNU coreutils are optional)
Default user interface X11 (XFCE, GNOME, MATE or others) or command line
Official website alpinelinux.org

Alpine Linux is a Linux distribution based on musl[2] and BusyBox, which has the goal of being lightweight and secure by default while still being useful for general-purpose tasks. Alpine Linux uses PaX and grsecurity patches in the default kernel and compiles all packages with stack-smashing protection. It is primarily designed for x86 routers, firewalls, VPNs, VoIP and servers.[3][4]

History[edit]

Originally, Alpine Linux began as a fork of the LEAF project.[5] The members of LEAF wanted to continue making a Linux distribution that could fit on a single floppy disk, whereas the Alpine Linux wished to include some more heavyweight packages such as Squid and Samba, as well as additional security features and a newer kernel. One of the original goals was to create a framework for larger systems; although usable for this purpose, this is no longer a primary goal.

Features[edit]

  • Package management: Alpine uses its own package management system, apk-tools,[6] which originally was a collection of shell scripts but was later rewritten in C. Alpine currently contains most commonly used packages such as GNOME, Xfce, Firefox, and others.
  • Running from RAM: Alpine Linux can be installed as a run-from-ram distribution. The LBU (Local BackUp) tool optionally allows all configuration files to be backed up to an APK overlay file (usually shortened to apkovl), a tar.gz file that by default stores a copy of all changed files in /etc (with the option to add more directories).
  • Security: PaX and grsec are included in the default Alpine Linux kernel, which aids in reducing the impact from exploits similar to the vmsplice() local root exploit. All packages are also compiled with stack-smashing protection to help mitigate the effects of userland buffer overflows.
  • Size: the base system in Alpine Linux is designed to be only 4-5MB in size (excluding the kernel).[3] This allows very small Linux containers and Docker (software) images. The Linux kernel is much larger; the 3.18.16 kernel includes 121MB of loadable kernel modules (primarily drivers) in addition to the 3.3MB for the base x86 64 kernel image. A base x86 64 install might be 256MB.
  • Alpine Configuration Framework (ACF): While optional, ACF is an application for configuring an Alpine Linux machine, with goals similar to Debian's debconf.
  • C standard library: Alpine Linux previously used uClibc instead of the traditional glibc most commonly used. Although it is lighter weight, it does have the significant drawback of being binary incompatible with glibc. Thus, all software must be compiled for use with uClibc to work properly. Recently (as of April 9, 2014), Alpine Linux switched to musl, which is at least partially binary compatible to glibc.[7]
  • Init system: The simple and lightweight OpenRC is the init system currently used by Alpine Linux.[8] Unlike Debian, Ubuntu, RHEL and CentOS distributions of Linux, Alpine does not use the controversial systemd.

External links[edit]

References[edit]