Comment créer un fichier vide en ligne de commande sous Windows ?

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Comment créer un fichier vide en ligne de commande sous Windows ?

[ayi]

Without redirection, Luc Vu or Erik Konstantopoulos point out to:

copy NUL EMptyFile.txt
copy /b NUL EmptyFile.txt

“How to create empty text file from a batch file?” (2008) also points to:

type NUL > EmptyFile.txt
# also
echo. 2>EmptyFile.txt
copy nul file.txt > nul # also in qid's answer below
REM. > empty.file
fsutil file createnew file.cmd 0 # to create a file on a mapped drive

Nomad mentions an original one:

C:\Users\VonC\prog\tests>aaaa > empty_file
'aaaa' is not recognized as an internal or external command, operable program or batch file.

C:\Users\VonC\prog\tests>dir

 Folder C:\Users\VonC\prog\tests

27/11/2013  10:40    <REP>          .
27/11/2013  10:40    <REP>          ..
27/11/2013  10:40                 0 empty_file

In the same spirit, Samuel suggests in the comments:

the shortest one I use is basically the one by Nomad:

.>out.txt

It does give an error:

'.' is not recognized as an internal or external command

But this error is on stderr. And > only redirects stdout, where nothing have been produced.

Hence the creation of an empty file.

The error message can be disregarded here. Or, as in Rain’s answer, redirected to NUL:

.>out.txt 2>NUL

(Original answer, November 2009)

echo.>filename

(echo "" would actually put “” in the file! And echo without the ’

(Réponse tronquée)