Review the list of prerequisites to be sure your CLI operations will succeed.


All aspera client operations perform certificate validation.

For transfers other than those to and from Aspera on Cloud or the Aspera on Cloud transfer service, the included certs directory (or your own certificate authority keys) must be located either in the parent directory of the aspera executable, or in a location that you specify through the -b command-line argument.

If a transfer server does not have a valid certificate to allow the operation, you must specify the --insecure option.

Required Aspera Software

The machine that runs the aspera client must have either an Aspera server or ascp (which is provided with this package) installed, in the same directory as the aspera executable -- in the PATH or in standard Aspera installation locations.