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There are a number of Unix-like operating systems based on or descended from the Berkeley Software Distribution (BSD) series of Unix variant options. The three most notable descendants in current use are FreeBSD, OpenBSD, and NetBSD, which are all derived from 386BSD and 4.4BSD-Lite, by various routes.
Unix-like: 4.4 elks: FreeBSD: BSD; GPL, LGPL software usually included Monolithic with modules C 1:1 BSD, Unix-like 11 DragonFly BSD OpenBSD: BSD Monolithic C 1:1 BSD, Unix-like 6.4 MirOS: NetBSD: BSD Monolithic with modules C 1:1 BSD, Unix-like 7.0 OpenBSD DragonFly BSD: BSD Hybrid: C 1:1 BSD, Unix-like No OpenSolaris, illumos: CDDL ...
This is a list of real-time operating systems (RTOSs). This is an operating system in which the time taken to process an input stimulus is less than the time lapsed until the next input stimulus of the same type.
See comparison of Linux distributions for a detailed comparison. Linux distributions that have highly modified kernels — for example, real-time computing kernels — should be listed separately. There are also a wide variety of minor BSD operating systems, many of which can be found at comparison of BSD operating systems.
NOTE: Linux systems may vary by distribution which specific program, or even 'command' is called, via the POSIX alias function. For example, if you wanted to use the DOS dir to give you a directory listing with one detailed file listing per line you could use {{{1}}} (e.g. in a session configuration file).
Yes (system and user's zshenv, zprofile, zshrc, zlogin, zlogout) Yes (Unix feature) Yes Yes ash: POSIX: sh 1989 Yes Minix, BusyBox based systems NetBSD, Minix, BusyBox based systems BSD-style Yes Text-based CLI No Partial (for BusyBox, supported in command-line editing, but not in string handling [21]) — Yes Yes (arbitrary fds [citation needed])
Fork of the UNIX-like BSD operating system descendant OpenBSD 3.0, begun in July 2002. The project's objective to produce a free and fully secure, complete system, but with a small footprint. MirOS BSD: Core system based mostly on OpenBSD and some NetBSD code for 32-bit i386 and SPARC, updated via infrequent snapshots and by following "current".
For example, Microsoft Windows used BSD code in its implementation of TCP/IP [12] and bundles recompiled versions of BSD's command-line networking tools since Windows 2000. [13] Darwin, the basis for Apple's macOS and iOS, is based on 4.4BSD-Lite2 and FreeBSD. Various commercial Unix operating systems, such as Solaris, also incorporate BSD code.