How can I programmatically insert an image in to an excel file?

I have a folder with an excel file and an image. Which programming language can I use to insert the image to a cell programmatically? The files are located on a Linux server running a strictly terminal version of Ubuntu. My original plan was to use Python or PowerShell to activate a Visual Basic macro I had written in the Excel file, but macros would require the workbook to be open, which is not possible in my case.