comparing file sizes using the ls command on Linux or Unix.
https://files.mastodon.social/media_attachments/files/112/877/919/989/167/680/original/fda4f37ac6f8f982.png
Here is a handy and useful Linux and Unix shell script that reduce PDF file size using Ghostscript. No need to upload your PDF file to the shady third-party website. https://www.cyberciti.biz/faq/linux-shell-script-to-reduce-pdf-file-size/
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