Editing Environment variable (section)

== References ==
{{Reflist|refs=
<ref name="ClassicShS">{{cite book |title=Classic Shell Scripting |publisher=[[O'Reilly Media|O'Reilly]] |isbn=978-0-596-00595-5 |date=May 2005 |author-first1=Arnold |author-last1=Robbins |author-first2=Nelson H. F. |author-last2=Beebe |editor-last1=Apandi |editor-first1=Tatiana |editor-last2=Randal |editor-first2=Allison |editor-last3=Witwer |editor-first3=Adam |edition=1}}</ref>{{rp|112}}
<ref name="OG_unset">{{cite web |title=unset - unset values and attributes of variables and functions{{snd}} |work=Commands & Utilities Reference, [[Single UNIX Specification|The Single UNIX Specification]] - The Open Group Base Specifications, IEEE Std 1003.1-2008 |date=2016 |orig-date=2001 |edition=Issue 7 |issue=7 |publisher=The [[IEEE]] and [[The Open Group]] |url=http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#unset |access-date=2017-12-18 |url-status=live |archive-url=https://web.archive.org/web/20171218175244/http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html |archive-date=2017-12-18}}</ref>
<ref name="Bash_unset">{{cite web |title=The unset builtin command |date=2015-07-31 |orig-date=2011 |author=fgrose |work=Bash Hackers Wiki |url=http://wiki.bash-hackers.org/commands/builtin/unset |access-date=2017-12-18 |url-status=live |archive-url=https://web.archive.org/web/20171218175214/http://wiki.bash-hackers.org/commands/builtin/unset |archive-date=2017-12-18}}</ref>
<ref name="appdata">{{cite web |title=Store and retrieve settings and other app data |date=2017-11-14 |author-first1=Mike |author-last1=Jacobs |author-first2=Alexander |author-last2=Koren |author-first3=Michael |author-last3=Satran |publisher=[[Microsoft]] |url=https://docs.microsoft.com/en-us/windows/uwp/app-settings/store-and-retrieve-app-data |access-date=2017-12-18 |url-status=live |archive-url=https://web.archive.org/web/20171218175200/https://docs.microsoft.com/de-de/windows/uwp/design/app-settings/store-and-retrieve-app-data |archive-date=2017-12-18}}</ref>
<ref name="Schulz_2014_Ordner">{{cite journal |title=Ordner für spezielle Fälle&nbsp;— Die "benannten Ordner" in Windows aus User- und Entwicklersicht |trans-title=Special purpose folders&nbsp;— Windows' "named folders" from a user's and developer's perspective |author-first=Hajo |author-last=Schulz |date=2014-10-02 |journal=[[c't|c't - magazin für computertechnik]] |volume=2014 |issue=22 |pages=180–184 |publisher=[[Heise Verlag]] |language=de |url=https://www.heise.de/ct/ausgabe/2014-22-Die-benannten-Ordner-in-Windows-aus-User-und-Entwicklersicht-2406251.html |access-date=2019-04-08 |url-status=live |archive-url=https://web.archive.org/web/20160709114401/https://www.heise.de/ct/ausgabe/2014-22-Die-benannten-Ordner-in-Windows-aus-User-und-Entwicklersicht-2406251.html |archive-date=2016-07-09}}</ref>
<ref name="Caldera_1998_USER">{{cite book |title=Caldera DR-DOS 7.02 User Guide |publisher=[[Caldera, Inc.]] |date=1998 |orig-date=1993, 1997 |url=http://www.drdos.net/documentation/usergeng/uglontoc.htm |access-date=2013-08-10 |url-status=dead |archive-url=https://web.archive.org/web/20161104235434/http://www.drdos.net/documentation/usergeng/uglontoc.htm |archive-date=2016-11-04}}</ref>
<ref name="Caldera_1998_NEW703">{{cite book |title=DR-DOS 7.03 WHATSNEW.TXT&nbsp;— Changes from DR-DOS 7.02 to DR-DOS 7.03 |publisher=[[Caldera, Inc.]] |date=1998-12-24 |url=http://www.lookas.net/ftp/incoming/darbui/Justas/DRDOS/WHATSNEW.TXT |access-date=2019-04-08 |url-status=dead |archive-url=https://web.archive.org/web/20190408142232/http://www.lookas.net/ftp/incoming/darbui/Justas/DRDOS/WHATSNEW.TXT |archive-date=2019-04-08}}</ref>
<ref name="Caldera_1998_DELTREE101">{{cite book |title=DELTREE.BAT R1.01 Extended file and directory delete |author-first=Matthias R. |author-last=Paul |publisher=[[Caldera, Inc.]] |date=1998-01-09 |url=http://www.lookas.net/ftp/incoming/darbui/Justas/DRDOS/DELTREE.BAT |access-date=2019-04-08 |url-status=dead |archive-url=https://web.archive.org/web/20190408145354/http://www.lookas.net/ftp/incoming/darbui/Justas/DRDOS/DELTREE.BAT |archive-date=8 April 2019 }}</ref>
<ref name="4DOS_8.00_HELP">{{cite book |title=4DOS 8.00 online help |title-link=4DOS 8.00 |author-first1=Hardin |author-last1=Brothers |author-first2=Tom |author-last2=Rawson |author-link2=Tom Rawson |author-first3=Rex C. |author-last3=Conn |author-link3=Rex C. Conn |author-first4=Matthias R. |author-last4=Paul |author-first5=Charles E. |author-last5=Dye |author-first6=Luchezar I. |author-last6=Georgiev |date=2002-02-27}}</ref>
<ref name="Paul_1997_NWDOSTIP">{{cite book |title=NWDOS-TIPs&nbsp;— Tips & Tricks rund um Novell DOS 7, mit Blick auf undokumentierte Details, Bugs und Workarounds |work=MPDOSTIP |author-first=Matthias R. |author-last=Paul |date=1997-07-30 |orig-date=1994-05-01 |edition=3 |version=Release 157 |language=de |url=http://www.antonis.de/dos/dos-tuts/mpdostip/html/nwdostip.htm |access-date=2014-08-06 |url-status=live |archive-url=https://web.archive.org/web/20161104235829/http://www.antonis.de/dos/dos-tuts/mpdostip/html/nwdostip.htm |archive-date=2016-11-04}} (NB. NWDOSTIP.TXT is a comprehensive work on [[Novell DOS 7]] and [[OpenDOS 7.01]], including the description of many undocumented features and internals. The provided link points to a HTML-converted version of the file, which is part of the <code>MPDOSTIP.ZIP</code><!-- still named TIPS_MP.ZIP between 1991 and 1996-11 --> collection.) [https://web.archive.org/web/20190601152204/https://www.sac.sk/download/text/mpdostip.zip<!-- A yet older version 155 from 1997-05-13 of the 1997-07-15 distribution archive. -->]</ref>
<ref name="Paul_2002_OS">{{cite web |title=How to detect FreeCOM/FreeDOS in-batch? |author-first=Matthias R. |author-last=Paul |date=2002-02-20 |url=http://marc.info/?l=freedos-dev&m=101423986407077&w=2 |publisher=freedos-dev mailing list |access-date=2014-08-06 |url-status=live |archive-url=https://web.archive.org/web/20181106220459/https://marc.info/?l=freedos-dev&m=101423986407077&w=2 |archive-date=2018-11-06}}</ref>
<ref name="Paul_2002_CLS">{{cite web |title=Updated CLS posted |author-first=Matthias R. |author-last=Paul |date=2002-03-26 |url=http://marc.info/?l=freedos-dev&m=101717593306186&w=2 |publisher=freedos-dev mailing list |access-date=2014-08-06 |url-status=live |archive-url=https://web.archive.org/web/20181004145539/https://marc.info/?l=freedos-dev&m=101717593306186&w=2 |archive-date=2018-10-04}}</ref>
<ref name="Paul_1997_OD-A3">{{cite web|author-first=Matthias R. |author-last=Paul |title=Caldera OpenDOS 7.01/7.02 Update Alpha 3 IBMBIO.COM README.TXT |url=http://www.uni-bonn.de/~uzs180/download/ibmbioa3.zip |date=1997-10-02 |access-date=2009-03-29 |url-status=dead |archive-url=https://web.archive.org/web/20031004074600/http://www-student.informatik.uni-bonn.de/~frinke/ibmbioa3.zip |archive-date=2003-10-04}} [https://web.archive.org/web/20181225154705/http://mirror.macintosharchive.org/max1zzz.co.uk/+Windows%20&%20DOS/DOS/System/Novell/Support/Bins/Op702src.zip<!-- Op702src.zip is an unofficial renamed distribution of the ibmbioa3.zip file -->]</ref>
<ref name="Paul_1997_BATTIPS">{{cite book |title=BATTIPs&nbsp;— Tips & Tricks zur Programmierung von Batchjobs |at=7: ERRORLEVEL abfragen |work=MPDOSTIP |author-first=Matthias R. |author-last=Paul |date=1997-05-01 |orig-date=1993-10-01 |language=de |url=http://www.antonis.de/dos/batchtut/battips/index.htm#7 |access-date=2017-08-23 |url-status=live |archive-url=https://web.archive.org/web/20170823191411/http://www.antonis.de/dos/batchtut/battips/index.htm |archive-date=2017-08-23 }} [https://www.auersoft.eu/soft/by-others/dos-exitcodes-de.html] [https://www.auersoft.eu/soft/by-others/dos-exitcodes-en.html] {{Webarchive|url=https://archive.today/20170911103337/https://www.auersoft.eu/soft/by-others/dos-exitcodes-en.html |date=2017-09-11  }} (NB. BATTIPS.TXT is part of MPDOSTIP.ZIP. The provided link points to a HTML-converted older version of the BATTIPS.TXT file.) [https://web.archive.org/web/20190601152204/https://www.sac.sk/download/text/mpdostip.zip<!-- A yet older version 155 from 1997-05-13 of the 1997-07-15 distribution archive. -->]</ref>
<ref name="Allen_2005">{{cite web |author-first1=William |author-last1=Allen |author-first2=Linda |author-last2=Allen |title=Windows 95/98/ME ERRORLEVELs |url=http://www.allenware.com/mcsw/errorlevels.zip |url-status=dead |archive-url=https://web.archive.org/web/20110707113138/http://www.allenware.com/mcsw/errorlevels.zip |archive-date=2011-07-07}}</ref>
<ref name="FD_2003_Errorlevel">{{cite web |title=MS-DOS errorlevels |author-first1=Eric |author-last1=Auer |author-first2=Matthias R. |author-last2=Paul |author-first3=Jim |author-last3=Hall |author-link3=Jim Hall (programmer) |date=2015-12-24 |orig-date=2003-12-31 |url=http://www.freedos.org/technotes/technote/207.html |url-status=dead |archive-url=https://web.archive.org/web/20151224202118/http://www.freedos.org/technotes/technote/207.html |archive-date=2015-12-24}}</ref>
<ref name="Paul_2017">{{cite web |title=The continuing saga of Windows 3.1 in enhanced mode on OmniBook 300 |author-first=Matthias R. |author-last=Paul |orig-date=2017-08-07 |date=2017-08-14 |work=MoHPC - the Museum of HP Calculators |url=http://hpmuseum.org/forum/thread-8774-post-77196.html#pid77196 |access-date=2018-05-01 |url-status=live |archive-url=https://web.archive.org/web/20180501185933/http://hpmuseum.org/forum/thread-8774-post-77196.html |archive-date=2018-05-01 |quote=[…] set DRSYS=ON (optional to tell SYS you are aware of the fact that you're running it in a foreign environment and want to proceed anyway without having to individually ACK some warnings and extra info screens displayed in this scenario otherwise) […]}}</ref>
<ref name="Paul_1997_SETENV">{{cite web |title=SETENV v1.11 |author-first=Matthias R. |author-last=Paul |date=1997-05-27 |orig-date=1996 |url=http://www.uni-bonn.de:80/~uzs180/mpdokeng.html#M.SETENV |url-status=dead |archive-url=https://web.archive.org/web/20090215001349/http://www.uni-bonn.de/~uzs180/mpdokeng.html#M.SETENV |archive-date=2009-02-15 |quote=[…] SETENV […] to hide and later restore the […] pre-environment […] By using SETENV.COM you can save some KiloBytes of rare DOS memory […] depending on the number of drivers loaded by [[INSTALL (CONFIG.SYS directive)|INSTALL=]]/[[INSTALLHIGH (CONFIG.SYS directive)|INSTALLHIGH=]]/[[HIINSTALL (CONFIG.SYS directive)|HIINSTALL=]] and the current size of the pre-environment. […] this original […] feature cannot be found in any known memory manager/optimizer. […] |access-date=2019-08-09}}</ref>
<ref name="PTS-DOS_2000">{{cite web |title=PTS-DOS 2000 Pro User Manual |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}}</ref>
<ref name="CCI_1997_HELP">{{cite book |title=CCI Multiuser DOS 7.22 GOLD Online Documentation |id=HELP.HLP |date=1997-02-10 |publisher=[[Concurrent Controls, Inc.]] (CCI)}}</ref>
<ref name="CCI_1997_PRINTDOC">{{cite book |title=CCI Multiuser DOS 7.22 GOLD Installation Guide |id=PRINTDOC.HLP |date=1997-02-10 |publisher=[[Concurrent Controls, Inc.]] (CCI)}}</ref>
<ref name="Kotulla_1987_Environment">{{cite journal |title=Von CP/M zu MS-DOS, Teil 11 |language=de |author-first=Martin |author-last=Kotulla |author-link=Martin Kotulla |journal=Professional Computing (PC) - Schneider International |volume=3 |issue=11 |date=November 1987 |pages=100–103 |url=http://www.homecomputerworld.at/magazine/cpc/CPCAI-87-11.pdf |access-date=2018-05-20 |url-status=live |archive-url=https://web.archive.org/web/20190424201007/http://www.homecomputerworld.at/magazine/cpc/CPCAI-87-11.pdf |archive-date=2019-04-24}}</ref>
<ref name="Paul_2002_COM">{{cite newsgroup |title=Re: Run a COM file |author-first=Matthias R. |author-last=Paul |date=2002-10-07 |newsgroup=alt.msdos.programmer |url=https://groups.google.com/d/msg/alt.msdos.programmer/d7blJjY0H5M/Qu3VeTOIGVcJ |access-date=2017-09-03 |url-status=live |archive-url=https://archive.today/20170903230312/https://groups.google.com/forum/%23!msg/alt.msdos.programmer/d7blJjY0H5M/Qu3VeTOIGVcJ |archive-date=2017-09-03}} [https://groups.google.com/d/msg/alt.lang.asm/PNOd9zfYow0/vXbab16j4XwJ]</ref>
<ref name="Datalight_2005_ROM-DOS">{{cite web |title=Datalight ROM-DOS User's Guide |date=April 2005 |orig-date=1999 |id=3010-0200-0716 |author1=Datalight, Inc. |author-link1=Datalight, Inc. |author2=GPvNO |publisher=[[Datalight, Inc.]] |url=https://www.datalight.com/assets/files/ROM-DOS_Users_Guide.pdf |access-date=2018-09-16 |url-status=live |archive-url=https://web.archive.org/web/20190320151321/https://www.datalight.com/assets/files/ROM-DOS_Users_Guide.pdf |archive-date=2019-03-20}}</ref>
<ref name="Ten_XP">{{cite web |title=Environment Variables in Windows 10 - Complete List of Environment Variables in Windows 10 |author-first=Shawn |author-last=Brink |date=2018-11-17 |work=Windows Ten Forums |url=https://www.tenforums.com/tutorials/3234-environment-variables-windows-10-a.html |access-date=2019-04-24 |url-status=live |archive-url=https://web.archive.org/web/20190327135346/https://www.tenforums.com/tutorials/3234-environment-variables-windows-10-a.html |archive-date=2019-03-27}}</ref>
<ref name="Paul_1997_4DOSTIP">{{cite web |title=Hinweise zu JPSofts 4DOS 5.5b/c, 5.51, 5.52a und NDOS |work=MPDOSTIP |author-first=Matthias R. |author-last=Paul |date=1997-05-01 |orig-date=1995-03-01 |language=de |url=http://www.antonis.de/dos/dos-tuts/mpdostip/html/4dostip.htm |access-date=2015-05-08 |url-status=live |archive-url=https://web.archive.org/web/20161104211143/http://www.antonis.de/dos/dos-tuts/mpdostip/html/4dostip.htm |archive-date=2016-11-04}} (NB. The provided link points to a HTML-converted version of the <code>4DOS5TIP.TXT</code> file, which is part of the <code>MPDOSTIP.ZIP</code><!-- still named TIPS_MP.ZIP between 1991 and 1996-11 --> collection.) [https://web.archive.org/web/20190601152204/https://www.sac.sk/download/text/mpdostip.zip<!-- A yet older version 155 from 1997-05-13 of the 1997-07-15 distribution archive. -->]</ref>
<ref name="Paul_2002_CTMOUSE">{{cite web |title=Re: [fd-dev] ANNOUNCE: CuteMouse 2.0 alpha 1 |author-first=Matthias R. |author-last=Paul |work=freedos-dev |date=2002-04-06 |url=https://marc.info/?l=freedos-dev&m=101807226917577 |access-date=2020-02-07 |url-status=live |archive-url=https://web.archive.org/web/20200207130948/https://marc.info/?l=freedos-dev&m=101807226917577&w=2 |archive-date=2020-02-07 |quote=[…] In CTMOUSE.ASM prepareTSR routine I found a comment in regard to the zero-environment. […] [[DESQview]] or [[DR-DOS|DRDOS]] zero-env? […] release environment block […] skip if any problem […] zero-pad for [[MEM (DOS command)|MEM]] style utilities […]}}</ref>
<ref name="ESR_2002_BROWSER">{{cite web |url=http://www.catb.org/~esr/BROWSER/index.html |title=The BROWSER project |last=Raymond |first=Eric |author-link=Eric S. Raymond |date=2002-08-02 |orig-date=Originally published 2001 |access-date=2020-10-21 |url-status=live |archive-url=https://web.archive.org/web/20190921223921/http://www.catb.org/~esr/BROWSER/index.html |archive-date=2019-09-21}}</ref>
<ref name="LWN_2001_BROWSER">{{cite web |url=https://lwn.net/2001/0201/devel.php3 |title=LWN - Development |date=2001-02-01 |website=LWN.net |access-date=2020-10-21 |url-status=live |archive-url=https://web.archive.org/web/20190208125048/https://lwn.net/2001/0201/devel.php3 |archive-date=2019-02-08 |quote=Standardizing a BROWSER environment variable. Eric Raymond is promoting the use of a new environment variable, BROWSER, to complement the existing PAGER, MAILER, and EDITOR variables. This effort is being tested as an experiment in hacking social systems.}}</ref>
<ref name="PERL_ENV_BROWSER">{{cite web |url=https://metacpan.org/pod/Env::Browser |title=Env::Browser-0.06 |last=Špaček |first=Michal |date=2020-01-19 |orig-date=First version published 2013 |website=metacpan.org |access-date=2020-10-21 |url-status=live |archive-url=https://web.archive.org/web/20201021202950/https://metacpan.org/pod/Env::Browser |archive-date=2020-10-21 |quote=Env::Browser - Process environment variable $BROWSER and run web browser}}</ref>
<ref name="PYTHON_WEBBROWSER">{{cite web |url=https://docs.python.org/3/library/webbrowser.html |title=webbrowser — Convenient Web-browser controller |website=docs.python.org |access-date=2020-10-21 |url-status=live |archive-url=https://web.archive.org/web/20201013205951/https://docs.python.org/3/library/webbrowser.html |archive-date=2020-10-13}}</ref>
<ref name="DEBIAN_DFLT_WEB_BROWSER">{{cite web |url=https://wiki.debian.org/DefaultWebBrowser |title=DefaultWebBrowser - Debian Wiki |date=2020-06-10 |website=wiki.debian.org |access-date=2020-10-21 |url-status=live |archive-url=https://web.archive.org/web/20201021204658/https://wiki.debian.org/DefaultWebBrowser |archive-date=2020-10-21 |quote=The environment variable BROWSER can be set to[…] always choose your desired browser.}}</ref>
<ref name="GNU_BASH">{{cite web |title=Shell Variables |url=https://www.gnu.org/software/bash/manual/bash.html#Shell-Variables |website=Bash Reference Manual}}</ref>
<ref name="Paul_2001_COUNTRY">{{cite web |title=DOS COUNTRY.SYS file format |type=COUNTRY.LST file |author-first=Matthias R. |author-last=Paul |date=2001-06-10 |edition=1.44 |orig-date=1995 |url=http://www.columbia.edu/~em36/wpdos/MatthiasPaulCPI.zip<!-- not an official distribution archive, but contains an older version of COUNTRY.LST --> |access-date=2016-08-20 |url-status=live |archive-url=https://web.archive.org/web/20160420065252/http://www.columbia.edu/~em36/wpdos/MatthiasPaulCPI.zip |archive-date=2016-04-20}}</ref>
}}