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This is a list of POSIX (Portable Operating System 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 systems and most Unix-like operating systems.
less is a terminal pager program on Unix, Windows, and Unix-like systems used to view (but not change) the contents of a text file one screen at a time. It is similar to more, but has the extended capability of allowing both forward and backward navigation through the file.
The most common form of aliases, which just add a few options to a command and then include the rest of the command line, can be converted easily to shell functions following this pattern: alias ll = 'ls -Flas' # long listing, alias ll () { ls -Flas " $@ " ; } # long listing, function
Pages for logged out editors learn more. Contributions; Talk; ls (Unix and Linux command)
The GNU Core Utilities or coreutils is a package of GNU software containing implementations for many of the basic tools, such as cat, ls, and rm, which are used on Unix-like operating systems. In September 2002, the GNU coreutils were created by merging the earlier packages textutils , shellutils , and fileutils , along with some other ...
The DEVICE command displays a map of I/O links and routes. Under DOS and UNIX printing a file can be done with redirection; under UNIX it is normally done by spooling the file to the "line printer" (using the lpr command) because UNIX is conventionally a multi-user system. TRSDOS/LS-DOS 6.x print jobs can be redirected (such as to a disk file ...
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 command language and a scripting language , and is used by the operating system to control the execution of the system using shell scripts .
command is a shell command for Unix and Unix-like operating systems. It is used to execute a command whilst suppressing normal shell function lookup. [1] It is specified in the POSIX standard and is often implemented in Unix shells as a shell builtin function. Built-in functions take precedence over programs when resolving the name of a command.