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optipng:tldr:a3f4d

optipng: Compress a PNG with the best compression.
$ optipng -o${7} ${filename-png}
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The command "optipng -o${7} ${filename-png}" is used to optimize PNG (Portable Network Graphics) images using the optipng tool. Let's break down the command:

  1. "optipng": This is the name of the command-line tool used for optimizing PNG images.

  2. "-o${7}": The "-o" option is used to specify optimization level. The "${7}" is a placeholder, and it refers to the seventh argument passed to the command when executed. This means that the optimization level is determined by the value of the seventh argument.

  3. "${filename-png}": This is another placeholder that represents the filename of the PNG image that you want to optimize. The actual filename is passed as an argument when executing the command.

In summary, when you run this command, it will optimize a PNG image using optipng with the specified optimization level (determined by the seventh argument) and the filename provided.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.
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