Universe (Unix)

Universe (Unix)

In some versions of the Unix operating system, the term universe was used to denote some variant of the working environment. During the late 1980s, most commercial Unix variants were derived from either System V or BSD. Most versions provided both BSD and System V universes and allowed the user to switch between them. Each universe, typically implemented by separate directory trees or separate filesystems, usually included different binaries, libraries, man pages, and header files. While such a facility offered the ability to develop applications portable across both System V and BSD variants, the requirements in disk space and maintenance (separate configuration files, twice the work in patching systems) gave them a problematic reputation. Systems that offered this facility included Harris/Concurrent's CX/UX, Convex's Convex/OS, Apollo's Domain/OS (version 10 only), Pyramid's DC/OSx (dropped in SVR4-based version 2), Concurrent's Masscomp/RTU and Siemens' SINIX.

Some versions of System V Release 4 retain a system similar to Dual Universe concept, with BSD commands (which behave differently than classic System V commands) in /usr/ucb, BSD header files in /usr/ucbinclude and library files in /usr/ucblib.

External links

* Sven Mascheck, [http://www.in-ulm.de/~mascheck/various/sinix.html SINIX V5.20 Universes]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Unix time — Unix time, or POSIX time, is a system for describing points in time, defined as the number of seconds elapsed since midnight Coordinated Universal Time (UTC) of January 1 1970, not counting leap seconds. It is widely used not only on Unix like… …   Wikipedia

  • Unix — (officially trademarked as UNIX, sometimes also written as Unix with small caps) is a computer operating system originally developed in 1969 by a group of AT T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Douglas McIlroy, and… …   Wikipedia

  • IBM UniVerse — UniVerse is an example of a dimensional database also known as a multi value database system which runs on Windows and most major Unix and Linux releases. History UniVerse is an offshoot of the Pick operating system. It was created by VMark… …   Wikipedia

  • Вредоносные программы для Unix-подобных систем — Вероятно, первые компьютерные вирусы для семейства ОС Unix были написаны Фредом Коэном в ходе проведения экспериментов. В конце 1980 х появились первые публикации с исходными текстами вирусов на языке sh.[1] …   Википедия

  • Pyramid Technology — Corporation  американская компания по производству миникомпьютеров на основе RISC процессоров в верхнем сегменте производительности. Она также стала второй компанией поставлявшей многопроцессорные системы под управлением Unix (под брендом… …   Википедия

  • Pyramid Technology — was a computer company that produced a number of RISC based minicomputers at the upper end of the performance range. They also became the second company to ship a multiprocessor Unix system (branded OS/x), in 1985, which formed the basis of their …   Wikipedia

  • UGU — Unix Guru Universe (Community » Media) **** User Group University (Internet » Chat) * University Graduates Union (Academic & Science » Universities) …   Abbreviations dictionary

  • Pick operating system — Company / developer Don Nelson, Dick Pick, TRW Programmed in Assembly language Initial release 1965 (GIRLS), 1973 (Reality Operating System) Marketing target Business data processing Available …   Wikipedia

  • Comparison of relational database management systems — Programming language comparisons General comparison Basic syntax Basic instructions Arrays Associative arrays String operations …   Wikipedia

  • 11th millennium and beyond — The 11th millennium and beyond is a period of time that will begin on 1 January, 10001 CE. Several predictions have been made concerning this future time period. This article is a compendium of these predictions ranging from factual astronomical… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”