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  2. cat (Unix) - Wikipedia

    en.wikipedia.org/wiki/Cat_(Unix)

    Useless use of cat (UUOC) is common Unix jargon for command line constructs that only provide a function of convenience to the user. [12] In computing, the word "abuse", [13] in the second sense of the definition, is used to disparage the excessive or unnecessary use of a language construct; thus, abuse of cat is sometimes called "cat abuse".

  3. List of POSIX commands - Wikipedia

    en.wikipedia.org/wiki/List_of_POSIX_commands

    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.

  4. List of GNU Core Utilities commands - Wikipedia

    en.wikipedia.org/wiki/List_of_GNU_Core_Utilities...

    This is a list of commands from the GNU Core Utilities for Unix environments. These commands can be found on Unix operating systems and most Unix-like operating systems. GNU Core Utilities include basic file, shell and text manipulation utilities. Coreutils includes all of the basic command-line tools that are expected in a POSIX system.

  5. GNU Core Utilities - Wikipedia

    en.wikipedia.org/wiki/GNU_Core_Utilities

    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 ...

  6. Usage message - Wikipedia

    en.wikipedia.org/wiki/Usage_message

    In computer programming, a usage message or help message is a brief message displayed by a program that utilizes a command-line interface for execution. This message usually consists of the correct command line usage for the program and includes a list of the correct command-line arguments or options acceptable to said program.

  7. netcat - Wikipedia

    en.wikipedia.org/wiki/Netcat

    Optional telnet-options responder Rewrites like GNU's and OpenBSD's support additional features. For example, OpenBSD's nc supports TLS , and GNU netcat natively supports a tunneling mode supporting UDP and TCP (optionally allowing one to be tunneled over the other) in a single command, [ 3 ] where other versions may require piping data from ...

  8. TYPE (DOS command) - Wikipedia

    en.wikipedia.org/wiki/TYPE_(DOS_command)

    In computing, type is a command in various command-line interpreters such as COMMAND.COM, cmd.exe, 4DOS/4NT and Windows PowerShell used to display the contents of specified files on the computer terminal. The analogous Unix command is cat.

  9. hash (Unix) - Wikipedia

    en.wikipedia.org/wiki/Hash_(Unix)

    3 Options. 4 Exit Status. 5 ... hash is a command on Unix and Unix-like operating systems that prints the ... Searches for command cat in the path specified by PATH ...