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Command-line interpreter for Unix operating system
A Unix shell is a shell that provides a command-line user interface for a Unix-like operating system. A Unix shell provides a command language that can
Unix_shell
GNU replacement for the Bourne shell
Bash (short for "Bourne Again SHell") is an interactive command interpreter and command language developed for Unix-like operating systems. Created in
Bash_(Unix_shell)
Script written for an operating system shell
A shell script is a computer program designed to be run by a Unix shell, a command-line interpreter. The various dialects of shell scripts are considered
Shell_script
Family of computer operating systems
Unix (/ˈjuːnɪks/ , YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T
Unix
User-friendly interactive Unix shell
fish (friendly interactive shell; stylized in lowercase) is a Unix-like shell with a focus on interactivity and usability. fish is designed to be feature-rich
Fish_(Unix_shell)
Operating system that behaves similarly to Unix
version of the Single UNIX Specification. A Unix-like application is one that behaves like the corresponding Unix command or shell. Although there are general
Unix-like
Command line interpreter for Version 10 Unix and Plan 9 from Bell Labs operating systems
command-line interpreter for Version 10 Unix and Plan 9 from Bell Labs operating systems. It resembles the Bourne shell, but its syntax is somewhat simpler
Rc_(Unix_shell)
Command-line interpreter for operating systems
Bourne shell (sh) is a shell command-line interpreter for computer operating systems. It first appeared on Version 7 Unix, as its default shell. Unix-like
Bourne_shell
Direct interface to an operating system
extended to Unix-like systems and Microsoft Windows. On Unix-like systems, Secure Shell protocol (SSH) is usually used for text-based shells, while SSH
Shell_(computing)
Bourne shell backward compatible Unix shell created by David Korn
KornShell (ksh) is a Unix shell which was developed by David Korn at Bell Labs in the early 1980s and announced at USENIX on July 14, 1983. The initial
KornShell
Shell command for writing an input file or stream to standard output
form of concatenate. Originally developed for Unix, it is available on many operating systems and shells today. In addition to combining files, cat is
Cat_(Unix)
wish (Windowing Shell) is a Tcl interpreter extended with Tk commands, available for Unix-like operating systems supporting the X Window System, as well
Wish_(Unix_shell)
Mechanism for inter-process communication using message passing
completed. The standard shell syntax for anonymous pipes is to list multiple commands, separated by vertical bars ("pipes" in common Unix verbiage). The pipeline
Pipeline_(Unix)
Patterns used in computer programming
part of every Unix-like libc ecosystem and shell, including AT&T Bourne shell-compatible Korn shell (ksh), Z shell (zsh), Almquist shell (ash) and its
Glob_(programming)
Command-line utility
Unix, Plan 9, and Unix-like operating systems that evaluates conditional expressions. test was turned into a shell builtin command in 1981 with UNIX System
Test_(Unix)
Software interface based on commands formatted as lines of text
or shell. Examples of command-line interpreters are Nushell, DEC's DIGITAL Command Language (DCL) in OpenVMS and RSX-11, the various Unix shells (sh
Command-line_interface
Cross-platform shell based on .NET technology
interface via PowerShell cmdlets. PowerShell includes its own extensive, console-based help (similar to man pages in Unix shells) accessible via the
PowerShell
Shell command for removing non-essential information from executable code files
Means of compressing an executable file List of POSIX commands strings (Unix) – Shell command for extracting printable text from a binary file Symbol table –
Strip_(Unix)
Section of a source code file that is treated as if it were a separate file
Here documents originate in the Unix shell, and are found in the Bourne shell since 1979, and most subsequent shells. Here document-style string literals
Here_document
Unix command interpreter
The Thompson shell was the first Unix shell, introduced in the first version of Unix in 1971, and was written by Ken Thompson. It was a simple command
Thompson_shell
Shell command for moving files
POSIX commands ln (Unix) – Shell command for creating a link file move (command) – Shell command for moving files ren (command) – Shell command for renaming
Mv_(Unix)
Shell command for reporting available file system space
Wikibook Guide to Unix has a page on the topic of: Commands df: report free disk space – Shell and Utilities Reference, The Single UNIX Specification, Version
Df_(Unix)
freeing the command line for additional work with the shell. POSIX shells and other Unix shells allow background execution by using the & character at
Comparison_of_command_shells
Standards for operating systems for using the UNIX trademark
Single UNIX Specification (SUS) is a standard for computer operating systems, compliance with which is required to qualify for using the "UNIX" trademark
Single_UNIX_Specification
Lightweight Unix shell
Almquist shell (also known as A Shell, ash and sh) is a lightweight Unix shell originally written by Kenneth Almquist in the late 1980s. Initially a clone
Almquist_shell
Unix shell
The C shell (csh or the improved version, tcsh) is a Unix shell created by Bill Joy while he was a graduate student at University of California, Berkeley
C_shell
Unix shell
Unix-like utilities (though Zsh, unlike Bash, is not part of the GNU project itself). In 2019, macOS Catalina adopted Zsh as the default login shell,
Z_shell
Standard UNIX utility
The Unix command su, which stands for "substitute user" (or historically "superuser"), is used by a computer user to execute commands with the privileges
Su_(Unix)
Mathematical operation with only one operand
sizeof(type-name) Cast: (type-name) cast-expression In the Unix shell (Bash/Bourne Shell), e.g., the following operators are unary: Pre and Post-Increment:
Unary_operation
Shell command for listing files
ls is a shell command for listing files – including special files such as directories. Originally developed for Unix and later codified by POSIX and Single
Ls
Cryptographic network protocol
designed for Unix-like operating systems as a replacement for Telnet and unsecured remote Unix shell protocols, such as the Berkeley Remote Shell (rsh) and
Secure_Shell
Shell command for extracting printable text from a binary file
debugger List of POSIX commands Paste (Unix) – Shell command for joining files horizontally Strip (Unix) – Shell command for removing non-essential information
Strings_(Unix)
Shell command that defines a word that acts like a command
command. The command is available in Unix shells, AmigaDOS, 4DOS/4NT, FreeDOS, KolibriOS, PowerShell, ReactOS, EFI shell, and IBM i. Aliasing functionality
Alias_(command)
Shell commands to save and restore the working directory
via the dirs Unix command or Get-Location -stack PowerShell command. The working directory is at the top of the stack. The first Unix shell to provide a
Pushd_and_popd
Control of jobs in a Unix shell
In a Unix or Unix-like operating system, job control refers to controlling a process group as a job via a shell. Control features include suspend, resume
Job_control_(Unix)
User account on a remote server
A shell account is a user account on a remote server, typically running under Unix or Linux operating systems. The account gives access to a text-based
Shell_account
many shells on modern Unix, Unix-like and other operating systems. This list does not cover commands for all versions of Unix and Unix-like shells nor
List_of_POSIX_commands
Symbol "#!", used in computing
for shell scripts, is apparent in the documentation from Version 7 Unix in 1979,[page needed] which describes instead a facility of the Bourne shell where
Shebang_(Unix)
Software feature
multiple possible completions, some command-line interpreters, especially Unix shells, will list all possible completions beginning with those few characters
Command-line_completion
Shell command for extracting sections of text files
2020-09-05. The Wikibook Guide to Unix has a page on the topic of: Commands cut – Shell and Utilities Reference, The Single UNIX Specification, Version 5 from
Cut_(Unix)
Topics referred to by the same term
accessed Unix shell, a shell for Unix-like operating systems Shell script, a computer program designed to be run by a shell Bash (Unix shell) Bourne shell Read–eval–print
Shell
Shell command for formatting and outputting text; like printf() library function
shell command that formats and outputs text like the same-named C function. It is available in a variety of Unix and Unix-like systems. Some shells implement
Printf_(Unix)
Shell command for reporting and running with modified environment variables
Guide to Unix has a page on the topic of: Commands env: set the environment for command invocation – Shell and Utilities Reference, The Single UNIX Specification
Env
Unix shell command
read is a command found on Unix and Unix-like operating systems such as Linux. It reads a line of input from standard input or a file passed as an argument
Read_(Unix)
Command to change the working directory
operating system shells, most support a change directory command, including Unix and Unix-like (i.e. Linux) shells, and Microsoft shells including Command
Cd_(command)
Symbol representing the word "and" (&)
"Text" or "Code" fields. Some Unix shells use the ampersand as a metacharacter: Some Unix shells, like the POSIX standard sh shell, use an ampersand to execute
Ampersand
Unix operating system
Berkeley Software Distribution (BSD), also known as Berkeley Unix, is a discontinued Unix operating system developed and distributed by the Computer Systems
Berkeley Software Distribution
Berkeley_Software_Distribution
Computer protocol
implementation, Unix shell, and a set of standard Unix utilities (like ls, cat or dd—unlike other methods of remote access to files via a remote shell, scp for
Files transferred over shell protocol
Files_transferred_over_shell_protocol
Unix shell
The PWB shell (also known as the Mashey shell) was a Unix shell. The PWB shell was a modified (and generally constrained to be upward-compatible) version
PWB_shell
Hamilton C shell is a clone of the Unix C shell and utilities for Microsoft Windows created by Nicole Hamilton at Hamilton Laboratories as a completely
Hamilton_C_shell
Unix shell based on and compatible with the C shell
“tee-see-shell”, /ˈtiːʃɛl/ “tee-shell”, or as “tee see ess aitch”, tcsh) is a Unix shell based on and backward compatible with the C shell (csh). tcsh
Tcsh
Programming language for automation scripts
Unix-like operating systems Batch file language (BAT), for scripting Microsoft Windows Bourne shell, interpreted language for scripting Unix and Unix-like
Scripting_language
Computer program to process a stream
systems such as Unix are rich with filter programs. Windows 7 and later are also rich with filters, as they include Windows PowerShell. In comparison,
Filter_(software)
Computer environment variable
originated the idea of a search path. The early Unix shell only looked for program names in /bin, but by Version 3 Unix the directory was too large and /usr/bin
PATH_(variable)
Default macOS terminal emulator
conjunction with a Unix shell, such as zsh (the default interactive shell since macOS Catalina). The user can choose other shells available with macOS
Terminal_(macOS)
Shell command for copying and converting file data
dd (Data(set) Definition) is a shell command for reading, writing and converting file data. Originally developed for Unix, it has been implemented on many
Dd_(Unix)
Shell provider
(abbreviated as SDF, also known as freeshell.org) is a non-profit public access UNIX shell provider on the Internet. It has been in continual operation since 1987
SDF_Public_Access_Unix_System
Software emulation of a computer terminal
six virtual consoles provide a text terminal with a login prompt to a Unix shell. The graphical X Window System traditionally starts in the seventh virtual
Virtual_console
Computer function
Shell Commands". Archived from the original on 2016-10-29. Retrieved 2016-11-01. Tansley, David (2000). "24. Shell built-in commands". Linux and Unix
Shell_builtin
Interface enabling remote access to a web server
languages, such as Active Server Pages, ASP.NET, Python, Perl, Ruby, and Unix shell scripts, are also employed. Attackers identify vulnerabilities often in
Web_shell
Shell command for finding files
Selects files with a name that matches a shell-glob pattern. -type type Selects files that are a specific Unix file type: b: block device (buffered) c:
Find_(Unix)
Command in Unix and Unix-like operating systems
In computing, time is a command in Unix and Unix-like operating systems. It is used to determine the duration of execution of a particular command. time(1)
Time_(Unix)
Type of denial-of-service software attack
executed by & $_. A classic example of a fork bomb is one written in Unix shell :(){ :|:& };:, dating back to at least 1999, which can be more easily
Fork_bomb
shell (dash) Emacs shell eshell Friendly interactive shell fish KornShell ksh PowerShell pwsh rc shell rc, a shell for Plan 9 from Bell Labs and Unix
List of command-line interpreters
List_of_command-line_interpreters
Unix shell builtin
available on Unix and Unix-like operating systems. It is specified in the POSIX standard and is often implemented in Unix shells as a shell builtin function
Command_(Unix)
Terminal emulator from GNOME
Havoc Pennington and others. Terminal emulators allow users to access a UNIX shell while remaining on their graphical desktop. GNOME Terminal (gnome-terminal
GNOME_Terminal
Feature of Unix shells and some programming languages
appeared in the Bourne shell, introduced with Version 7 Unix in 1979, and has remained a characteristic of all later Unix shells. The feature has since
Command_substitution
Early variant of Unix (1977) created by Bell Labs
The Programmer's Workbench (PWB/UNIX) was an early, now discontinued, version of the Unix operating system that had been created in the Bell Labs Computer
PWB/UNIX
British computer scientist
known as the author of the Bourne shell (sh), which is the foundation for the standard command-line interfaces to Unix. Bourne has a Bachelor of Science
Stephen_R._Bourne
Unix shell
Stand-alone shell (sash) is a Unix shell designed for use in recovering from certain types of system failures and errors. The built-in commands of sash
Stand-alone_shell
Linux distribution
ARM64 Kernel type Monolithic (Linux) Userland GNU Default user interface Unix shell, LXQt, LXDE, MATE, Cinnamon, Plasma, XFCE Official website artixlinux
Artix_Linux
The restricted shell is a Unix shell that restricts some of the capabilities available to an interactive user session, or to a shell script, running within
Restricted_shell
Computer program that runs as a background process
computing systems, the term daemon is used almost exclusively in the context of Unix-based systems. In other contexts, different terms are used for the same concept
Daemon_(computing)
Shell command that reports the working directory
working directory) is a shell command that reports the working directory path to standard output. Although often associated with Unix, its predecessor Multics
Pwd
Topics referred to by the same term
C++ Unix shell, a general command-line shell for Unix Bourne shell, a command-line shell for Unix Thompson shell, a command-line shell for Unix Sharp
SH
Form of inter-process communication in computer systems
limited form of inter-process communication (IPC), typically used in Unix, Unix-like, and other POSIX-compliant operating systems. A signal is an asynchronous
Signal_(IPC)
Shell command for deleting files
Originally, developed for Unix, today it is also available on Unix-like and non Unix-like systems, KolibriOS, IBM i, EFI shell. and Windows (via UnxUtils)
Rm_(Unix)
Computer bug exploit caused by invalid data
PHP). Privilege escalation to either superuser permissions on UNIX by exploiting shell injection vulnerabilities in a binary file or to Local System privileges
Code_injection
Shell command that copies file
Collection of standard, Unix-based utilities from GNU List of POSIX commands mv – Shell command for moving files rm – Shell command for deleting files
Cp_(Unix)
Topics referred to by the same term
in 1934 Es (operating system), developed by Nintendo, then Google es (Unix shell), a command-line interpreter Expert system, to automate decision making
ES
Extension to the Tcl scripting language
scripting language. An Expect script can spawn a shell, look up environmental variables, perform some Unix commands to retrieve more information, and then
Expect
Any file that contains a reference to another file or directory
created the Windows shell, special folders, and shortcut files (see § Alternatives for details). In a Unix-like OS, the ln shell command can create either
Symbolic_link
Type of computer software
example is a Unix or Unix-like system where multiple remote users have access (such as via a serial port or Secure Shell) to the Unix shell prompt at the
Multi-user_software
Free software collection
for "GNU's Not Unix!", chosen because GNU's design is Unix-like, but differs from Unix by being free software and containing no Unix code. Stallman chose
GNU
Topics referred to by the same term
computer processing environment Job (Unix), a representation of a process group for process control in a Unix shell Job (role), activity done by a person
Job
Form of interprocess communication
function common to most command-line interpreters, including the various Unix shells that can redirect standard streams to user-specified locations. The concept
Redirection_(computing)
Strozzi NoSQL is a shell-based relational database management system initialized and developed by Carlo Strozzi that runs under Unix-like operating systems
Strozzi_NoSQL
Software application
command line interface, and for separating programs from the session of the Unix shell that started the program, particularly so a remote process continues running
Terminal_multiplexer
System monitor program
System htop, for the Unix shell Plasma System Monitor, included in KDE Plasma Desktop nmon, for Linux and AIX ps, for the Unix shell Task Manager, included
Task_manager
Command to print the file name of the terminal connected to standard input
man page". linux.die.net. Retrieved 2020-02-14. tty – Shell and Utilities Reference, The Single UNIX Specification, Version 5 from The Open Group tty(1) – FreeBSD
Tty_(Unix)
Typographic symbol
processing from the command line or as part of a Unix shell script ("bash file"). In most Unix shells (command interpreters), this is represented by the
Vertical_bar
Early commercial UNIX operating system
UNIX System V (pronounced: "System Five") is one of the first commercial versions of the Unix operating system. It was originally developed by AT&T and
UNIX_System_V
containing a program, optionally taking arguments, via a Unix shell, e.g., using a Shebang (Unix) #!/usr/bin/bs. An early man page states, "[bs] is a remote
Bs_(programming_language)
Software build automation tool
any operation available via the operating system shell. Make is widely used, especially in Unix and Unix-like operating systems, even though many competing
Make_(software)
Line-oriented text editor
editor was one of the first three key elements of the Unix operating system—assembler, editor, and shell—developed by Ken Thompson in August 1969 on a PDP-7
Ed_(text_editor)
Operating system
obsolete machine from floppy disks. A highly functional UNIX-like, network-enabled server with a Unix shell could be had from but one floppy disk. Another floppy
MuLinux
American computer programmer (born 1943)
David Gerard Korn (August 28, 1943) is an American UNIX programmer and the author of the Korn shell (ksh), a command line interface/programming language
David Korn (computer scientist)
David_Korn_(computer_scientist)
Family of Unix-like operating systems
display server (windowing system), a package manager, a bootloader, and a Unix shell. Linux is one of the most prominent examples of free and open-source software
Linux
Obsolete shell command for deleting files with unutterable names
switches) is an obsolete Unix shell command which enables deletion of files with non-typeable characters. The command debuted in Unix Version 1 and was replaced
Dsw_(command)
Software development philosophy
The Unix philosophy, originated by Ken Thompson, is a set of cultural norms and philosophical approaches to minimalist, modular software development. It
Unix_philosophy
UNIX SHELL
UNIX SHELL
Surname or Lastname
English
English : from Middle English cubit ‘forearm’ (from Latin cubitum), presumably applied as a nickname for someone with strong or otherwise remarkable forearms; in its extended sense, as a unit of length, it may have been a metonymic occupational name for a builder.
Girl/Female
American, Anglo, Australian, British, Chinese, English, French, Hebrew
From the Ledge Meadow; Form of Shelly; Meadow on a Hilltop; Little Rock; Ewe; Female Sheep
Surname or Lastname
English
English : variant spelling of Shelley.
Boy/Male
Arabic, Hindu, Indian, Muslim, Sindhi
Couple; Unit of Army
Male
English
Variant spelling of English Unni, UNI means "afflicted, depressed."
Male
English
English surname transferred to unisex forename use, derived from the name of various places SHELLEY means "clearing near a ledge/slope."
Surname or Lastname
English (also present in Ireland)
English (also present in Ireland) : from Middle English peni, peny ‘penny’, applied as a nickname, possibly for a person of some substance or for a tenant who paid a rent of one penny. This was the common Germanic unit of value when money was still an unusual phenomenon. It was the only unit of coinage in England until the early 14th century, when the groat and the gold noble were introduced, and was a silver coin of considerable value. There is some evidence that the word was used in Old English times as a byname.
Boy/Male
Muslim/Islamic
Unit of army
Girl/Female
Hindu
A unit of measure for long distances, A plan
Surname or Lastname
English
English : unexplained. Perhaps a patronymic from Enoch or a variant of Irish Ennis.
Girl/Female
Indian, Sanskrit, Telugu
Unit of Ancient Indian Military
Male
English
Short form of English unisex Shelley, SHELL means "clearing near a ledge/slope."
Girl/Female
Indian, Telugu
Uni-dimensional
Boy/Male
Arabic, Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Muslim, Oriya, Parsi, Sindhi, Telugu
Gold Coin; Gold Unit of Coinage; Name of the Grandfather of Abu Bin Thabit
Boy/Male
Norse
A Dane.
Surname or Lastname
English
English : habitational name from Shell, a place in Worcestershire, so named from Old English scylf ‘bank’, ‘shelf’.Jewish (Ashkenazic) : ornamental name from German Schelle ‘bell’.Americanized spelling of German Schall or Schill.
Girl/Female
Tamil
A unit of measure for long distances, A plan
Boy/Male
Indian
Unit of army
Surname or Lastname
English, German, and Dutch
English, German, and Dutch : patronymic from a pet form of Nicholas (German Nikolaus).Irish (County Limerick) : Anglicized form of Gaelic Mac Nioceais ‘son of Nicholas’, which was taken by some Limerick families named Woulfe.German (southern and Upper Rhine) : from a nickname from Middle High German nickes(e), nixe ‘water sprite’.
Boy/Male
Muslim
Unit of army
UNIX SHELL
UNIX SHELL
Surname or Lastname
English
English : variant of Farrar.
Girl/Female
Tamil
Wave
Boy/Male
Arabic, Indian, Muslim, Pakistani, Tamil, Urdu
Unperceived Pearl
Girl/Female
Biblical Hebrew
My delight is in her.
Girl/Female
English
which is a.
Boy/Male
Christian, Hindu, Indian, Tamil
Father of Christ
Female
Esperanto
Esperanto name SPIRITA means "witty."
Boy/Male
Indian, Marathi
Gold
Boy/Male
Hindu
Girl/Female
English Scottish
Flatland.
UNIX SHELL
UNIX SHELL
UNIX SHELL
UNIX SHELL
UNIX SHELL
n.
A single thing, as a magnitude or number, regarded as an undivided whole.
n.
A gold coin of the reign of James I., of the value of twenty shillings.
v. t.
To displace; to unfix by violence.
n.
A unit; one; as, to score a single.
n.
See Fodder, a unit of weight.
n.
Any one of numerous species of fresh-water mussels belonging to Unio and many allied genera.
v. t.
To loosen from a fastening; to detach from anything that holds; to unsettle; as, to unfix a bayonet; to unfix the mind or affections.
n.
A single thing or person.
fem.
One of a class of water spirits, commonly described as of a mischievous disposition.
a.
A typical, structural unit; a type.
n.
Any one of numerous species of Unio, and related fresh-water genera; -- called also river mussel. See Naiad, and Unio.
n.
Any determinate amount or quantity (as of length, time, heat, value) adopted as a standard of measurement for other amounts or quantities of the same kind.
n.
See Nix.
v. t.
To make fluid; to dissolve.
n.
A bond of affinity, or a unit of valence between atoms; -- applied to a unit of chemical force or attraction.
v. t.
To loose; to unfix; to unbind; to untie.
v. t.
To reduce to a unit, or one whole; to form into a unit; to unify.
n.
The least whole number; one.
n.
The quantity of a fluid that crosses a unit area of a given surface in a unit of time.