echo -n "hello world" | md5sum 5eb63bbbe01eeed093cb22bb8f5acdc3 echo -n "hello world" | openssl md5 -binary | base64 XrY7u+Ae7tCTyyK7j1rNww== (echo 0:; echo 5eb63bbbe01eeed093cb22bb8f5acdc3) | xxd -r | base64 XrY7u+Ae7tCTyyK7j1rNww==