Interface) commands as specified by IEEE Std 1003.1-2024, which is part of the Single UNIX Specification (SUS). These commands can be found on Unix operating...

used in shell scripts and batch files. The command has been implemented in operating systems such as Unix, DOS, IBM OS/2, MetaComCo TRIPOS, AmigaOS (where...

Unix (/ˈjuːnɪks/ , YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T...

ls is a command to list computer files and directories in Unix and Unix-like operating systems. It is specified by POSIX and the Single UNIX Specification...

The command command in Unix and Unix-like operating systems is a utility to execute a command. It is specified in the POSIX standard. It is present in...

In computing, cp is a command in various Unix and Unix-like operating systems for copying files and directories. The command has three principal modes...

cat is a standard Unix utility that reads files sequentially, writing them to standard output. The name is derived from its function to (con)catenate files...

manual page) is a form of software documentation usually found on a Unix or Unix-like operating system. Topics covered include computer programs (including...

Single UNIX Specification (SUS) is a standard for computer operating systems, compliance with which is required to qualify for using the "UNIX" trademark...

any version of the Single UNIX Specification. A Unix-like application is one that behaves like the corresponding Unix command or shell. Although there...

rm (short for remove) is a basic command on Unix and Unix-like operating systems used to remove objects such as computer files, directories and symbolic...

A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive...

The Unix philosophy, originated by Ken Thompson, is a set of cultural norms and philosophical approaches to minimalist, modular software development. It...

The Unix command su, which stands for 'substitute user' (or historically 'superuser'), is used by a computer user to execute commands with the privileges...

The ln command is a standard Unix command utility used to create a hard link or a symbolic link (symlink) to an existing file or directory. The use of...

touch is a command used to update the access date and/or modification date of a computer file or directory. It is included in Unix and Unix-like operating...

wc (short for word count) is a command in Unix, Plan 9, Inferno, and Unix-like operating systems. The program reads either standard input or a list of...

tr is a command in Unix, Plan 9, Inferno, and Unix-like operating systems. It is an abbreviation of translate or transliterate, indicating its operation...

df (abbreviation for disk free) is a standard Unix command used to display the amount of available disk space for file systems on which the invoking user...

mv is a Unix command that moves one or more files or directories from one place to another. If both filenames are on the same filesystem, this results...

In computing, sort is a standard command line program of Unix and Unix-like operating systems, that prints the lines of its input or concatenation of...

The command is available as a separate package for Microsoft Windows as part of the UnxUtils collection of native Win32 ports of common GNU Unix-like...

In Unix, Plan 9, and Unix-like operating systems, the strip program is a command-line utility used to remove non-essential information from executable...

UUCP (Unix-to-Unix Copy) is a suite of computer programs and protocols allowing remote execution of commands and transfer of files, email and netnews between...

dd is a command-line utility for Unix, Plan 9, Inferno, and Unix-like operating systems and beyond, the primary purpose of which is to convert and copy...

In most Unix and Unix-like operating systems, the ps (process status) program displays the currently-running processes. The related Unix utility top provides...

When a text file with a shebang is used as if it were an executable in a Unix-like operating system, the program loader mechanism parses the rest of the...

head is a program on Unix and Unix-like operating systems used to display the beginning of a text file or piped data. The command syntax is: head [options]...

(DCL) in OpenVMS and RSX-11, the various Unix shells (sh, ksh, csh, tcsh, zsh, Bash, etc.), CP/M's CCP, DOS' COMMAND.COM, as well as the OS/2 and the Windows...

The computer tool patch is a Unix program that updates text files according to instructions contained in a separate file, called a patch file. The patch...