sum is a legacy utility available on some Unix and Unix-like operating systems. This utility outputs a 16-bit checksum of each argument file, as well...
5 KB (482 words) - 09:36, 7 January 2023
one-point union of topological spaces Whitney sum, of fiber bundles Zero-sum problem in combinatorics Sum (Unix), a program for generating checksums StartUp-Manager...
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Research Unix refers to the early versions of the Unix operating system for DEC PDP-7, PDP-11, VAX and Interdata 7/32 and 8/32 computers, developed in...
22 KB (1,356 words) - 04:00, 26 June 2025
system storage use – space used for a file or a directory tree. The Single UNIX Specification (SUS) specifies that by default, du reports the space allocated...
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SYSV checksum (redirect from Unix System V checksum)
legacy checksum algorithm. It has been implemented in UNIX System V and is also available through the sum command line utility. This algorithm is useless on...
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Diff (redirect from Diff (Unix))
the early 1970s for the Unix operating system, at Bell Labs in Murray Hill, New Jersey. It was part of the 5th Edition of Unix released in 1974, and was...
40 KB (4,476 words) - 08:17, 14 July 2025
database of quotations. Early versions of the program appeared in Version 7 Unix in 1979. The most common version on modern systems is the BSD fortune, originally...
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Kahan summation algorithm (redirect from Kahan sum)
effect extending the precision of the sum by the precision of the compensation variable. In particular, simply summing n {\displaystyle n} numbers in sequence...
27 KB (3,531 words) - 10:41, 9 July 2025
Cksum (category Standard Unix programs)
cksum is a command in Unix and Unix-like operating systems that generates a checksum value for a file or stream of data. The cksum command reads each...
5 KB (480 words) - 00:16, 26 February 2024
UnxUtils (redirect from Unix Utils)
UnxUtils is a collection of utility programs that provide popular Unix-based shell commands – ported from GNU implementations as native Windows programs...
5 KB (375 words) - 17:24, 20 April 2025
Tar (computing) (redirect from Tar (Unix))
and treat it as good if either the signed or unsigned sum matches the included checksum. Unix filesystems support multiple links (names) for the same...
36 KB (4,037 words) - 22:06, 2 April 2025
File-system permissions (redirect from Unix permission)
users and groups of users. One well-established technology was developed for Unix and later codified by POSIX. Another common technology is an access-control...
19 KB (2,013 words) - 19:26, 20 July 2025
GNU Core Utilities (category Unix software)
coreutils is a collection of GNU software that implements many standard, Unix-based shell commands. The utilities generally provide POSIX compliant interface...
15 KB (1,182 words) - 12:58, 14 May 2025
Tacit programming (section Unix pipeline)
reputation of being unnecessarily obscure, hence the epithet "pointless style". Unix scripting uses the paradigm with pipes. Tacit programming can be illustrated...
9 KB (1,154 words) - 00:07, 3 April 2025
Top (software) (redirect from Top (UNIX))
top is a task manager or system monitor program, found in many Unix-like operating systems, that displays information about CPU and memory utilization...
11 KB (1,301 words) - 20:27, 15 May 2025
checksum (Unix) 16 bits sum with circular rotation SYSV checksum (Unix) 16 bits sum with circular rotation sum8 8 bits sum Internet Checksum 16 bits sum (ones'...
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Ping (networking utility) (redirect from Ping (Unix))
Retrieved 8 September 2010. My original impetus for writing PING for 4.2a BSD UNIX came from an offhand remark in July 1983 by Dr. Dave Mills ... I named it...
19 KB (2,069 words) - 04:26, 6 July 2025
CPU time (section Unix commands for CPU time)
The Unix command top provides CPU time, priority, elapsed real time, and other information for all processes and updates it in real time. The Unix command...
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Dc (computer program) (redirect from DC (unix))
by Lorinda Cherry and Robert Morris at Bell Labs. It is one of the oldest Unix utilities, preceding even the invention of the C programming language. Like...
19 KB (2,646 words) - 12:51, 30 April 2025
GNU Units (redirect from Units (Unix))
Adrian Mariano as an implementation of the units utility included with the Unix operating system. It was originally available under a permissive license...
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traditionally been adept at expressing one-liners. Shell interpreters such as Unix shells or Windows PowerShell allow for the construction of powerful one-liners...
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Novell (redirect from Novell Unix Systems Group)
attempted to compete directly with Microsoft by acquiring Digital Research, Unix System Laboratories, WordPerfect, and the Quattro Pro division of Borland...
162 KB (15,828 words) - 22:50, 6 July 2025
Eqn (software) (category Unix stubs)
Part of the troff suite of Unix document layout tools, eqn is a preprocessor that formats equations for printing. A similar program, neqn, accepted the...
5 KB (352 words) - 13:45, 3 July 2025
available in many modern operating systems, generally named traceroute in Unix-like systems such as FreeBSD, macOS, and Linux and named tracert in Windows...
14 KB (1,544 words) - 10:27, 23 May 2025
Santa Cruz Operation (category Unix history)
selling three Unix operating system variants for Intel x86 processors: Xenix, SCO UNIX (later known as SCO OpenDesktop and SCO OpenServer), and UnixWare. SCO...
186 KB (18,909 words) - 20:20, 14 July 2025
AWK (category Standard Unix programs)
Like sed and grep, it is a filter, and it is a standard feature of most Unix-like operating systems. The AWK language is a data-driven scripting language...
41 KB (4,763 words) - 11:26, 11 July 2025
BusyBox (category Unix software)
BusyBox is a software suite that provides several Unix utilities in a single executable file. It runs in a variety of POSIX environments such as Linux...
38 KB (3,863 words) - 11:03, 13 May 2025
running the Classic Mac OS (1985), AT&T UNIX PC (1985), Atari ST (1988), OS/2 (1989), Microsoft Windows (1989), SCO Unix (1990), Handheld PC (1996), Pocket...
99 KB (9,252 words) - 17:18, 19 July 2025
(by finding the largest path length and then assigning the jobs). tsort, a Unix program for topological sorting Feedback arc set, a set of edges whose removal...
23 KB (3,170 words) - 16:32, 22 June 2025