Type (Unix)

Not to be confused with TYPE (DOS command).
type
Original authorAT&T Corporation
DevelopersVarious open-source and commercial developers
Initial release1984; 42 years ago (1984)
Operating systemUnix and Unix-like
PlatformCross-platform
TypeCommand

In Unix and Unix-like operating systems, type is a command that describes how its arguments would be interpreted if used as command names.

Function

Where applicable, type will display the command name's path.[1][2] Possible command types are:

The command returns a non-zero exit status if command names cannot be found.

Examples

$ type test
test is a shell builtin
$ type cp
cp is /bin/cp
$ type unknown
unknown not found
$ type type
type is a shell builtin

History

The type command was a shell builtin for Bourne shell that was introduced in AT&T's System V Release 2 (SVR2) in 1984,[3] and continues to be included in many other POSIX-compatible shells such as Bash. However, type is not part of the POSIX standard. With a POSIX shell, similar behavior is retrieved with 

command -V name

In the KornShell, the command whence provides similar functionality.[4]

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 utilities.[5]

See also

Wikibooks logo
The Wikibook Guide to Unix has a page on the topic of: Commands

References

  1. ^ "Use Type Command in Linux to Get More Info About Commands". Linux Handbook. 2020-05-11. Retrieved 2025-02-09.
  2. ^ "type command in Linux with Examples". GeeksforGeeks. 2019-05-06. Archived from the original on 2025-03-04. Retrieved 2025-02-09.
  3. ^ "traditional Bourne shell family / history and development". www.in-ulm.de. Archived from the original on 2004-02-03. Retrieved 2018-10-07.
  4. ^ Siever, Ellen (27 July 2005). Linux in a Nutshell. Nutshell handbooks. O'Reilly Media, Inc. (published 2005). p. 695. ISBN 9780596009304. Retrieved 2016-07-05. whence [...] Korn shell only. Show whether each command is a Unix command, a built-in command, a defined shell function, or an alias.
  5. ^ "Native Win32 ports of some GNU utilities". Archived from the original on 2006-02-09. Retrieved 2026-02-03.
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