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<p><b>New page</b></p><div>{{sources|date=November 2020}}<br />
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{{Infobox software<br />
| name = unix2dos & dos2unix<br />
| logo = <br />
| screenshot = <br />
| screenshot size = <br />
| caption = <br />
| author = John Birchfield<br />
| developer = Benjamin Lin, Bernd Johannes Wuebben, Christian Wurll, Erwin Waterlander<br />
| released = {{Start date and age|1989}}<br />
| latest release version = {{wikidata|property|preferred|references|edit|P348|P548=Q2804309}}<br />
| latest release date = {{Start date and age|{{wikidata|qualifier|preferred|single|P348|P548=Q2804309|P577}}|df=yes}}<br />
| operating system = [[Unix-like]], [[DOS]], [[OS/2]], [[Microsoft Windows|Windows]]<br />
| platform = [[Cross-platform]]<br />
| genre = [[Command (computing)|Command]]<br />
| license = [[FreeBSD]] style license<br />
| website = {{URL|https://waterlan.home.xs4all.nl/dos2unix.html}}<br />
}}<br />
'''{{code|unix2dos}}''' (sometimes named {{code|todos}} or {{code|u2d}}) is a tool to convert [[Newline|line breaks]] in a [[text file]] from [[Unix]] format (Line feed) to [[DOS]] format ([[carriage return]] + Line feed) and vice versa. When invoked as {{code|unix2dos}} the program will convert a Unix text file to DOS format, when invoked as {{code|dos2unix}} it will convert a DOS text file to Unix format.<ref>A practical guide to Linux. Mark G. Sobell {{ISBN|0-13-147823-0}} Page 55</ref><br />
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==Usage==<br />
Unix2dos and dos2unix are not part of the Unix standard. Commercial Unixes usually come with their own implementation of unix2dos/dos2unix, like SunOS/Solaris's ''dos2unix/unix2dos'', HP-UX's ''dos2ux/ux2dos'' and Irix's ''to_unix/to_dos''.<br />
<br />
There exist many open source alternatives with different command names and options like ''dos2unix/unix2dos'', ''d2u/u2d'', ''{{Not a typo|fromdos/todos}}'', ''endlines'', ''flip''. The multi-call binary [[busybox]] includes an implementation of ''unix2dos/dos2unix''.<br />
<br />
See the [[Man page|manual page]] of the respective commands.<br />
<br />
==Alternatives to unix2dos conversion==<br />
{{blist<br />
|recode <syntaxhighlight lang="console"><br />
$ recode latin1..dos file<br />
</syntaxhighlight><br />
| Open the file with Windows Write ([[WordPad]]) or Microsoft Word, and save in "plain text" format.<br />
| Similar results can be achieved with different Unix tools to change the trailing newline '\n' to a combination of carriage return and newline characters '\r\n', for example with [[perl]] or the GNU implementation of [[sed]] in-line editing:<br />
* <syntaxhighlight lang="console" inline><br />
$ perl -i -p -e 's|[\r\n]+|\r\n|g' file<br />
</syntaxhighlight><br />
* <syntaxhighlight lang="console" inline><br />
$ sed -i -n -z 's/\r*\n/\r\n/g;p' file<br />
</syntaxhighlight><br />
}}<br />
<br />
==Alternatives to dos2unix conversion==<br />
For the opposite conversion ({{mono|[[dos2unix]]}}) it is possible to use, for example, the utility [[tr (Unix)|tr]] with the {{code|-d '\r'}} flag to remove the carriage return characters:<br />
* <syntaxhighlight lang="console" inline><br />
$ tr -d '\r' < file > file2 # For ASCII and other files which do not contain multibyte characters (Not utf-8 safe).<br />
</syntaxhighlight><br />
* <syntaxhighlight lang="console" inline><br />
$ perl -i -p -e 's/\r//g' file<br />
</syntaxhighlight><br />
* <syntaxhighlight lang="console" inline><br />
$ sed -i -e 's/\r//g' file<br />
</syntaxhighlight><br />
<br />
Note: The above method assumes there are only DOS line breaks in the input file. Any Mac line breaks (\r) present in the input will be removed.<br />
<br />
An alternative to the dos2unix conversion is possible by using the {{code|col}} command that is available on [[Linux]] and other Unix-like operating systems, including Mac OS X. In the following case, InFile contains the undesired DOS (^M) line endings. After execution, OutFile is either created or replaced, and contains UNIX line endings. The {{code|-b}} option tells {{code|col}} not to output backspace characters.<br />
<syntaxhighlight lang="console"><br />
$ col -b < InFile > OutFile<br />
</syntaxhighlight><br />
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==See also==<br />
* [[Newline]]<br />
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==References==<br />
{{Reflist}}<br />
<br />
==External links==<br />
* [http://www.thefreecountry.com/tofrodos/ Tofrodos] - software that provides dos2unix and unix2dos<br />
* [http://waterlan.home.xs4all.nl/dos2unix.html Dos2Unix] - Dos2Unix / Unix2Dos - Text file format converters<br />
<br />
{{Unix commands}}<br />
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[[Category:System administration]]<br />
[[Category:Unix text processing utilities]]<br />
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