xdg-mime:tldr:e9151
This command is used to query the default application associated with a specific file type, in this case, the file type is PNG images.
The "xdg-mime" command is a utility in Linux systems that is used to query or set the default MIME (Multipurpose Internet Mail Extensions) type and default applications associated with file types.
The "query" option is used to retrieve the default application associated with a specific file type.
The "default" parameter specifies that we want to retrieve the default application.
"${image-png}" is a variable that contains the MIME type of PNG images. MIME types are used to identify the type of content that a file contains. In this case, it represents the MIME type for PNG images.
Overall, this command is used to retrieve the default application associated with PNG image files using the "xdg-mime" utility.