There is a command group 'az_iot_du_update'. This group of commands could 'device update update management'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_iot_du_update_calculate hash'.The syntax is: az iot du update calculate-hash --file-path
                                [--hash-algo {sha256}]. The 1th example of the child command would be to use it to 'calculate the base64 representation of a sha256 digest for a target update file', the syntax is: az iot du update calculate-hash --file-path /path/to/file. The 2th example of the child command would be to use it to 'calculate the base64 representation of a sha256 digest for multiple target update files', the syntax is: az iot du update calculate-hash --file-path /path/to/file1 --file-path /path/to/file2 --file-path /path/to/file3. The parameter '--file-path -f' is required. It is used to local path to target file for hash calculation. --file-path can be used 1 or more times.. The parameter '--hash-algo' is optional. cryptographic algorithm to use for hashing.. 