optipng:tldr:723e8
optipng: Compress a PNG and add interlacing.
$ optipng -i ${1} ${filename-png}
try on your machine
The command optipng is used to optimize PNG image files. Here is a breakdown of the command:
- The -i option is used to display information about the input file and the resulting image after optimization.
- ${1} is a placeholder for the first argument provided to the command when executing a shell script or command-line command. It represents the input PNG file that needs to be optimized. For example, if you execute the command as "optipng -i image.png", ${1} will be replaced with "image.png".
- ${filename-png} is a custom placeholder representing the output filename after optimization. It implies that the output file should have the same name as the input file but with the .png file extension. For example, if the input file is "image.png", the optimized output file will also be named "image.png".
In summary, this command will take a PNG image file as input, optimize it using optipng, display information about the input and optimized file, and save the optimized file with the same name and a .png file extension.
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.