The instructions for certbot on the EFF website for macOS instruct you to schedule the automatic renewal using Cron. On recent versions of macOS, Cron has been deprecated in favour of launchctl. Setting up a Launch Daemon is fairly straightforward...
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I recently needed to search through a fairly extensive list of files to find when the most recently modified files were last edited, and needed to search in a folder and all subfolders. This one-liner did the trick for me...
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