openssl generate pfx from crt key and bundle(s)

generation of PFX from standard and sepate key certificate and bundles with openssl ( linux , windows and mac )

openssl pkcs12 -export -out FILE.pfx -inkey DOMAIN.key -in DOMAIN.crt -in AUTHORITY.(pem|ca|bundle|crt) -in OTHER_AUTHORITY.(pem|ca|bundle|crt)

at this point the command print out a password request , that is good to use for security purposes