# Share (command)
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{{Lowercase title}}
{{Infobox software
| name = share
| logo =
| screenshot =
| screenshot size =
| caption =
| developer = [Microsoft](/source/Microsoft), [Paragon Technology Systems](/source/Paragon_Software_Group), [DR](/source/Digital_Research), [Datalight](/source/Datalight), [Novell](/source/Novell), Ron Cemer
| released = {{Release year|df=yes|1984}}
| latest release version =
| latest release date =
| operating system = [MS-DOS](/source/MS-DOS), [PTS-DOS](/source/PTS-DOS), [SISNE plus](/source/SISNE_plus), [Windows](/source/Microsoft_Windows), [DR DOS](/source/DR_DOS), [ROM-DOS](/source/ROM-DOS), [FreeDOS](/source/FreeDOS)
| genre = [Command](/source/Command_(computing))
| license =
| website =
}}
In [computing](/source/computing), '''share''' is a [command](/source/command_(computing)) for [DOS](/source/DOS) that allows software to perform [file lock](/source/file_lock)s. Locking files became necessary when [MS-DOS](/source/MS-DOS) began allowing files to be accessed simultaneously by multiple programs, either through [multitasking](/source/computer_multitasking) or [networking](/source/computer_networking).[{{Citation
| last1 = Jamsa
| first1 = Kris A.
| title = DOS: The Complete Reference
| publisher = [Osborne McGraw-Hill](/source/Osborne_McGraw-Hill)
| page = 206
| year = 1993
| isbn = 0078819040
| url = https://books.google.com/books?id=UW9GAAAAYAAJ
| postscript= .
}}][{{cite web|url=http://www.easydos.com/share.html|title=DOS Command: SHARE}}][[http://www.computerhope.com/sharehlp.htm MS-DOS and Windows command line share command]]
==Implementations==
On MS-DOS, the command is available in versions 3 and later.[{{Cite book|author-last=Wolverton|author-first=Van|title=Running MS-DOS Version 6.22 (20th Anniversary Edition), 6th Revised edition|date=2003|publisher=[Microsoft Press](/source/Microsoft_Press)|isbn=0-7356-1812-7}}] The command is also available in [FreeDOS](/source/FreeDOS),[{{cite web|url=http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.2/repos/pkg-html/group-base.html |title=FreeDOS 1.2 Updates Group - FreeDOS Base |publisher=Ibiblio.org |date= |accessdate=2022-09-08}}] [PTS-DOS](/source/PTS-DOS),[
{{cite web |title=PTS-DOS 2000 Pro User Manual |publisher=[Paragon Technology GmbH](/source/Paragon_Technology_GmbH) |location=Buggingen, Germany |date=1999 |url=http://download.paragon-software.com/doc/manual_dos_eng.pdf |access-date=2018-05-12 |url-status=live |archive-url=https://web.archive.org/web/20180512094512/http://download.paragon-software.com/doc/manual_dos_eng.pdf |archive-date=2018-05-12}}] and [SISNE plus](/source/SISNE_plus).[{{Cite web |url=https://datassette.org/manuais/ibm-pc/sisne-plus-referencia-sumaria |title=SISNE plus - Referência Sumária {{!}} Datassette |access-date=2019-09-28 |archive-date=2019-09-28 |archive-url=https://web.archive.org/web/20190928211058/https://datassette.org/manuais/ibm-pc/sisne-plus-referencia-sumaria |url-status=dead }}] The FreeDOS version was developed by Ron Cemer and is licensed under the [GPL](/source/GNU_General_Public_License).[{{cite web|url=http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/distributions/1.2/repos/pkg-html/share.html |title=FreeDOS 1.2 Updates Package - share (FreeDOS Base) |publisher=Ibiblio.org |date=2007-10-20 |accessdate=2022-09-08}}] [DR DOS 6.0](/source/DR_DOS_6.0)[[https://www.4corn.co.uk/archive/docs/DR%20DOS%206.0%20User%20Guide-opt.pdf DR DOS 6.0 User Guide Optimisation and Configuration Tips]] and [Datalight](/source/Datalight) [ROM-DOS](/source/ROM-DOS)[{{cite web|url=https://www.datalight.com/assets/files/ROM-DOS_Users_Guide.pdf|title=Datalight ROM-DOS User's Guide|website=www.datalight.com}}] include an implementation of the {{code|share}} command.
[Windows XP](/source/Windows_XP) and later versions include [16-bit](/source/16-bit) commands (nonnative) for the [MS-DOS subsystem](/source/Virtual_DOS_machine) that are included to maintain MS-DOS compatibility. The share MS-DOS subsystem command performs functions that are now inherent to [Microsoft Windows](/source/Microsoft_Windows). It is available to preserve compatibility with existing files, but has no effect at the [command line](/source/command-line_interface) because the functionality is automatic. The 16-bit MS-DOS subsystem commands are not available on [64-bit](/source/64-bit) editions of Windows.[[https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-xp/bb490895(v%3dtechnet.10) MS-DOS subsystem commands]]
==Design==
There were five locking modes:
*Deny None
*Deny Read
*Deny Write
*Deny All
*Compatibility (designed for [backward compatibility](/source/backward_compatibility) with existing MS-DOS programs)
The program runs as a [terminate-and-stay-resident program](/source/terminate-and-stay-resident_program) and is typically loaded at boot-up.
==Syntax==
share [/F:space] [/L:locks]
*'''/F:space''' Allocates file space (in bytes) for file-sharing information.
*'''/L:locks''' Sets the number of files that can be locked at one time.
==See also==
*[List of DOS commands](/source/List_of_DOS_commands)
==References==
{{Reflist}}
==Further reading==
*{{Cite book|author-last=Cooper|author-first=Jim|title=Special Edition Using MS-DOS 6.22, Third Edition|date=2001|publisher=[Que Publishing](/source/Que_Publishing)|isbn=978-0789725738}}
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Category:External DOS commands
{{DOS-stub}}
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Adapted from the Wikipedia article [Share (command)](https://en.wikipedia.org/wiki/Share_(command)) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Share_(command)?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.