Mac OS X: Command Line checksum - md5, sha1 and sha56

I’m often using MacOS X to verify checksum of files I’ve downloaded from the interwebs, such as .iso files.  I seem to quickly forget the simple commands that allow me to check files against 3 different types of hashes or checksums.  The commands should be similar when using a linux or unix variant. Let’s say I want to burn an ISO to a usb drive for my new favorite linux distro, Kali Linux.

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