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qlmanage:tldr:844e4
The command you provided is a mix of shell syntax and a specific command called "qlmanage" that is used on macOS.
"qlmanage" is a command-line tool on macOS that allows you to interact with Quick Look, which is a feature that provides a preview of files.
Now let's break down the command:
-
${*-jpg}
: This is a shell variable that is being passed as an argument to theqlmanage
command. It uses wildcard characters (*
) to match any string and append "-jpg" to it. So, if you have files like "file1.jpg", "file2.jpg", etc. in the current directory, this argument will match and preview those files. -
-t
: This is an option flag for theqlmanage
command, which stands for "Thumbnail." It tellsqlmanage
to generate a thumbnail of the file(s) specified in the previous argument. -
-s ${300}
: This is another option flag forqlmanage
that stands for "scale" and specifies the size of the thumbnail to be generated. In this case, the size is set to 300 pixels. -
${path-to-directory}
: This is a placeholder for the actual path to the directory where the files you want to preview are located. You would need to replace${path-to-directory}
with the actual directory path in order for the command to work correctly.
So, when you run this command in a macOS terminal with the appropriate directory path, it will use qlmanage
to generate thumbnails of jpeg files in that directory with a size of 300 pixels.