How to inspected the file system to investigate if the image was uploaded After I upload an image, I see blank image. How can I inspect the file system to investigate if the image was uploaded or not?

Thanks,
M
If your file is not appearing after an upload via the field api then you might want to check if your files directory is writable by apache. Typically this would be sites/default/files. 

NOTE: sites/default/files should ONLY be writable by apache and nothing else.