Substitua o espaço do nome do arquivo pela Bash subscore
for file in *; do mv "$file" `echo $file | tr ' ' '_'` ; done
Disgusted Dog
for file in *; do mv "$file" `echo $file | tr ' ' '_'` ; done
find . -type f -name "* *" -exec bash -c 'mv "$0" "${0// /_}"' {} \;Get-ChildItem C:\NewFolder -Directory -Recurse | Rename-Item -NewName {$_.Name -replace '_',' '}