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pwd

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pwd
Original author(s)AT&T Bell Laboratories
Developer(s)Various open-source and commercial developers
Initial releaseJune 1974; 50 years ago (1974-06)
Written inC
Operating systemMultics, Unix, Unix-like, V, Plan 9, Inferno, SpartaDOS X, PANOS, Windows CE, KolibriOS
PlatformCross-platform
TypeCommand
Licensecoreutils: GPLv3+
Plan 9: MIT License

pwd (print working directory)[1][2][3] is shell command that reports the working directory path to standard output.[4][5][6][7][8][9][10]

Although often associated with Unix, its predecessor Multics had a pwd command (which was a short name of the print_wdir command[11]) from which the Unix command originated.[12] The command is part of the X/Open Portability Guide since issue 2 of 1987. It was inherited into the first version of POSIX.1 and the Single Unix Specification.[13] It appeared in Version 5 Unix.[14] The version bundled in GNU Core Utilities was written by Jim Meyering.[15]

The command is available in other shells and operating systems including SpartaDOS X,[16] PANOS,[17] and KolibriOS.[18] PowerShell provides pwd as an alias for the cmdlet Get-Location. An equivalent command in COMMAND.COM and Command Prompt is the cd command with no arguments. On Windows CE 5.0, cmd.exe includes a pwd command.[19] The OpenVMS equivalent is show default.

The numerical computing environments MATLAB and GNU Octave include a pwd function with similar functionality.[20][21]

The command is implemented as a shell builtin in many Unix shells including sh, ash, bash, ksh, and zsh. It can be implemented with the POSIX getcwd() or getwd() functions.

Examples

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The following examples are based on a typical Unix-based implementation.

With no arguments, the command writes the working directory path to the terminal:

$ cd /home/example
$ pwd
/home/example

Display the working directory without any symbolic link info. If at a directory /home/symlinked that is a symlink to /home/realdir:

$ cd /home/symlinked
$ pwd -P
/home/realdir

Display the working directory with symbolic link info. Note: POSIX requires that the default behavior be as if the -L switch were provided.

$ pwd -L
/home/symlinked

Shell variables

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POSIX shells set the following environment variables while using the cd command:[22]

OLDPWD
The previous working directory
PWD
The current working directory

See also

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References

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  1. ^ "pwd(1) [minix man page]". www.unix.com.
  2. ^ "pwd - print name of current/working directory - man page". www.mankier.com.
  3. ^ "GNU Coreutils". www.gnu.org.
  4. ^ Unix Time-Sharing System: Unix Programmer's Manual (PDF). Vol. 1 (7th ed.). Bell labs. January 1979. p. 142. Archived from the original (PDF) on 2005-05-20.
  5. ^ "pwd(1) [plan9 man page]". www.unix.com.
  6. ^ "pwd". pubs.opengroup.org.
  7. ^ "pwd(1) [osf1 man page]". www.unix.com.
  8. ^ "Apple OS X MAN page".
  9. ^ "pwd(1) - OpenBSD manual pages". man.openbsd.org.
  10. ^ "pwd(1) [opensolaris man page]". www.unix.com.
  11. ^ "working_dir, wd, print_wdir, pwd (Multics help segment)". MIT. Retrieved 7 March 2020.
  12. ^ Van Vleck, Tom. "Unix and Multics". Multicians.org. Retrieved 7 March 2020.
  13. ^ wc – Shell and Utilities Reference, The Single UNIX Specification, Version 5 from The Open Group
  14. ^ pwd(1) – FreeBSD General Commands Manual
  15. ^ pwd(1) – Linux User Manual – User Commands
  16. ^ "SpartaDOS X 4.48 User Guide" (PDF).
  17. ^ "Chris's Acorns: Panos". chrisacorns.computinghistory.org.uk.
  18. ^ "Shell - KolibriOS wiki". wiki.kolibrios.org.
  19. ^ "Command Processor Commands (Windows CE 5.0)". docs.microsoft.com.
  20. ^ "Identify current folder - MATLAB pwd". www.mathworks.com.
  21. ^ "Function Reference: pwd". octave.sourceforge.io.
  22. ^ "cd". pubs.opengroup.org.

Further reading

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