exiv2:tldr:7d558
The command "exiv2 ${filename}" is using the exiv2 tool to perform an operation on a given file specified by the variable "${filename}".
exiv2 is a command-line tool used for managing metadata in image files, such as EXIF data. It allows you to extract, modify, and delete metadata from images.
In this command, "${filename}" is a placeholder for the actual file name or path that you want to manipulate with exiv2. You need to replace "${filename}" with the actual file name or path in order to use the command correctly.
For example, if you have an image file called "photo.jpg" and you want to extract its metadata using exiv2, the command would be:
exiv2 photo.jpg
This will execute the exiv2 tool and perform the desired operation on the specified file.