How to replace all spaces by underscores in all file names of a folder?

user_1742973 0
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I'm trying to rename all the files inside a folder (all .exe files). I want to replace all the spaces with underscores, e.g. qwe qwe qwe asd.exe to qwe_qwe_qwe_asd.exe.

I need to do this using the command line. I tried a lot of possible solutions I found on internet and even on this site, but I can't make it work.

I also need to do this in "one single line" / "one command", but I'll accept all the working answers.

cmd windows replace
8 Answers

Save the following 2 commands in a .bat file. It will replace " " with "_" in all files and folders, recursively, starting from the folder where the file is stored.

forfiles /s /m *.* /C "cmd /e:on /v:on /c set \"Phile=@file\" & if @ISDIR==FALSE ren @file !Phile: =_!"
forfiles /s /C "cmd /e:on /v:on /c set \"Phile=@file\" & if @ISDIR==TRUE ren @file !Phile: =_!"

Note: First line is doing this for files, and second one is doing this for folders. Each line can be used separately.

user_103848700

Minor tweak to Hamza Rashid's answer. Specifically his recursive.bat script.

recursive.bat

set orig=%cd%

for /d /r . %%D in (*) do (
    copy replace.bat "%%D\replace.bat"
    cd "%%D"
    replace.bat
    del replace.bat
    cd %orig%
)

replace.bat stays the same and the instructions stay the same.

user_37633920
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