exiv2:tldr:a466b

The command "exiv2 -P kv ${filename}" is a command-line instruction that utilizes the program "exiv2" to manipulate or extract metadata information from an image file specified by the variable ${filename}.

Here is a breakdown of the command:

• "exiv2": It is a program or utility used for managing metadata in various image file formats.
• "-P": It is an option or flag in exiv2 that tells the program to output the metadata in a key-value format.
• "kv": It specifies that the metadata should be displayed in a key-value format. "k" represents the keys (or properties) of the metadata, and "v" represents their corresponding values.
• "${filename}": It is a placeholder for the actual filename of the image file you want to operate on. You should replace ${filename} with the appropriate file name or file path.

Overall, this command instructs the program exiv2 to display metadata information of an image file in a key-value format.