This fault-tolerance sets the alias apart from similar functions in some other operating systems, such as the Unix symbolic link or the Microsoft Windows shortcut, at the expense of increased complexity and unpredictability.

AIX / 370 was IBM's third attempt to offer Unix-like functionality for their mainframe line, specifically the System / 370 ( the prior versions were a TSS / 370 based Unix system developed jointly with AT & T c. 1980, and VM / IX a VM / 370 based system developed jointly with Interactive Systems Corporation c. 1984 ).

* It follows the Unix toolbox concept that each program should accomplish a single, well-done task, as opposed to attempting to accomplish everything with one tool.

His " Software Tools " series spread the essence of ' C / Unix thinking ' with makeovers for BASIC, FORTRAN, and Pascal-and most notably his ' Ratfor ' ( rational FORTRAN ) was put in the public domain.

* The Unix Programming Environment, a tutorial book along with Rob Pike

* The Unix Programming Environment ( 1984 with Rob Pike )

Their operating systems, called MCP ( Master Control Program — the name later borrowed by the screenwriters for Tron ), were programmed in ESPOL ( Executive Systems Programming Oriented Language, a minor extension of ALGOL ), and later in NEWP ( with further extensions to ALGOL ) almost a decade before Unix.

For a long period, it was the " classic " Unix desktop associated with commercial Unix workstations.

These are more compliant with Unix terminal standards and user interface conventions than the Cygwin console, but are less suited for running Windows console programs.

* Various utilities are provided for converting between Windows and Unix paths and file formats, for handling line ending ( CRLF / LF ) issues, for displaying the DLLs that an executable is linked with, etc.

Dhrystone was published in Ada, with the C version for Unix developed by Rick Richardson (" version 1. 1 ") greatly contributing to its popularity.

ed can be found on virtually every version of Unix and Linux available, and as such is useful for people who have to work with multiple versions of Unix.

* ed, a more powerful Unix line editor with regular expressions.

This contrasts with the combination of C with Unix shells, wherein compiled functions are a special class of program objects and interactive commands are strictly interpreted.

It was modeled after the DBX debugger, which came with Berkeley Unix distributions.

The Hurd aims to surpass Unix operating systems in functionality, security, and stability, while remaining largely compatible with them.

After 1980 the subculture coalesced with the culture of Unix.

By the release of Version 6 Unix ( 1975 ), the game had been ported to Unix C. An implementation of Hunt the Wumpus was typically included with MBASIC, Microsoft's BASIC interpreter for CP / M and one of the company's first products.

Some Unix programmers argue that traditional command-line POSIX tools constitute a complete development environment, an IDE, though one with a different style of interface and under the Unix environment.

It may be included with any operating system where it works or can be made to work, including both free and commercial versions of Unix and Hewlett-Packard ( formerly DEC ) VMS ( OpenVMS ).

Despite the age of this concept, file managers based on Norton Commander are actively developed, and dozens of implementations exist for DOS, Unix, and Microsoft Windows.

The concept of regular expressions was first popularized by utilities provided by Unix distributions, in particular the editor ed and the filter grep.

Although computer users today are used to a high degree of both hardware and software interoperability, in the 20th century the open systems concept could be promoted by Unix vendors as a significant differentiator.

More advanced Unix filesystems include the Access Control List concept which allows permissions to be granted to multiple users or groups.

A Hartmann pipeline is an extension of the Unix pipeline concept, providing for more complex paths, multiple input / output streams, and other features.

In computing, a named pipe ( also known as a FIFO for its behavior ) is an extension to the traditional pipe concept on Unix and Unix-like systems, and is one of the methods of inter-process communication.

The FreeBSD web site has noted Evi Nemeth's 1988 remarks about cultural-historical daemons in the Unix System Administration Handbook: " The ancient Greeks ' concept of a ' personal daemon ' was similar to the modern concept of a ' guardian angel ' ... As a rule, UNIX systems seem to be infested with both daemons and demons.

Eric S. Raymond has proposed the glider as an emblem to represent the hacker subculture, as the Game of Life appeals to hackers, and the concept of the glider was " born at almost the same time as the Internet and Unix ".

The concept was invented by Douglas McIlroy for Unix shells and it was named by analogy to a physical pipeline.

The robot in the icon for Apple's Automator, which also uses a pipeline concept to chain repetitive commands together, holds a pipe in homage to the original Unix concept.

The Unix system call pipe is a classic example of this concept ; although other operating systems do support pipes as well.

At the show they announced the concept as Bedrock, with plans to expand it in the future to support Unix, OS / 2, Windows NT and Taligent.

In this respect it was similar in concept to Unix, although the implementation was much different, using messages instead of memory.

In earlier versions Mach was simply a modified version of existing BSD kernels, but in Mach 3 the Unix services were separated out and run as a user-space program like any other, a concept Mach referred to as a server.

In Mach, the system was arranged as a set of one-way asynchronous pipes ( ports ) between programs, a concept derived from Unix pipes.

This is an extension of the original Unix concept, one which had slowly disappeared as more and more functionality had been added over the years.

* The Root of All Evil, a User Friendly webcomic compilation book alluding to the Unix concept of the root user

** Filter ( Unix ), a program that gets most of its data from its standard input ( the main input stream ) and writes its main results to its standard output ( the main output stream )

* File ( command ), a Unix program for determining the type of data contained in a computer file

This allowed the model ( later used by Unix ) of separate read-only shareable code segment ( normally the high segment ) and read-write data / stack segment ( normally the low segment ).

* Operating system descriptors of resources that are allocated to the process, such as file descriptors ( Unix terminology ) or handles ( Windows ), and data sources and sinks.

This contrasts with other file systems that store file and directory records in separate structures ( such as DOS's FAT file system or the Unix File System ), where having structure distributed across the disk means that damaging a single directory is generally non-fatal and the data may possibly be re-constructed with data held in the non-damaged portions.

The vfat filesystem driver provides long filename support using the same disk data structures that Microsoft Windows uses for VFAT long filename support on FAT format volumes, but it does not support any extra Unix file semantics.

vfat, whilst lacking full Unix file semantics and lacking the ability to have Linux installed on and running from a FAT disk volume, does not have the aforementioned disadvantages of umsdos when it comes to simply sharing data on a FAT disk volume between Linux and other operating systems such as Windows.

Unlike the PET's floppy system, however, users of the ICON used Unix commands to copy data to their personal floppy disks from its " natural " location in the user's home directory on the hard drive.

In Unix and Unix-like operating systems, a filter is a program that gets most of its data from its standard input ( the main input stream ) and writes its main results to its standard output ( the main output stream ).

Patch systems such as patch ( Unix ) traditionally used diff data that was a script of ed commands.

* Browse-for viewing data sets, Partitioned Data Set ( PDS ) members, and Unix System Services files.

* Edit-for editing data sets, PDS members, and Unix System Services files.

Administrators have the ability to configure NIS to serve password data to outside processes to authenticate users using various versions of the Unix crypt ( 3 ) hash algorithms.

While a more traditional language like C does not support object orientation as fluidly as more recent languages, the notion of, for example, a file, stream, or device driver ( in Unix, each represented as a file descriptor ) can be considered a good example of object orientation: they are, after all, abstract data types, with various methods in the form of system calls, whose behavior varies based on the type of object, whose implementation details are hidden from the caller, and might even use inheritance in their underlying code.

* dd ( Unix ), a program that copies and convert files and data

** back-passwd: uses a Unix system's passwd and group data

ISAAC is used in the Unix tool shred to securely overwrite data.

*, used to query a DNS server for DNS data ( deprecated on Unix systems in favour of the tool called “< tt > host </ tt >” and ; the preferred tool on Microsoft Windows systems ).

head is a program on Unix and Unix-like systems used to display the first few lines of a text file or piped data.

* Seismic Unix, a collection of seismic data processing tools

* cp ( Unix ) – Unix command for copying data