How to rename files by removing a number and a fixed string from begin and keep just number before file extension?

You can achieve this using various scripting languages such as Python, PowerShell, or even a Windows batch script. Below are examples of how to accomplish this task using Python and PowerShell:

Using Python:

pythonCopy code
import os



def rename_files(directory):

    for filename in os.listdir(directory):

        if filename.endswith('.txt'):  # Change to the desired file extension

            new_filename = filename.split('_')[0] + os.path.splitext(filename)[1]

            os.rename(os.path.join(directory, filename), os.path.join(directory, new_filename))



if __name__ == "__main__":

    target_directory = "path_to_directory"  # Replace with the actual directory path

    rename_files(target_directory)

Using PowerShell:

powershellCopy code
$targetDirectory = "path_to_directory"  # Replace with the actual directory path

$files = Get-ChildItem -Path $targetDirectory -Filter "*_*.txt"  # Change the filter as needed



foreach ($file in $files) {

    $newName = $file.Name -replace '_.*', $file.Extension

    Rename-Item -Path $file.FullName -NewName $newName

}

Replace "path_to_directory" with the actual path of the directory containing the files you want to rename. Adjust the file extension and the separator (_ in this case) in the script according to your specific requirements.

Remember to test these scripts on a small set of files before using them on a large number of files to avoid unintended changes.