rdiff-backup --api-version 201 -v9 --print-statistics testingbackup
testingbackup-backup
usage: rdiff-backup [-h] [--api-version API_VERSION] [--current-time
CURRENT_TIME] [--force] [--fsync | --no-fsync]
[--null-separator] [--new | --no-new]
[--chars-to-quote CHARS] [--parsable-output]
[--remote-schema REMOTE_SCHEMA] [--remote-tempdir
DIR_PATH] [--ssh-compression | --no-ssh-compression]
[--tempdir DIR_PATH] [--terminal-verbosity
{0,1,2,3,4,5,6,7,8,9}] [--use-compatible-timestamps]
[-v {0,1,2,3,4,5,6,7,8,9}] [-V]
{backup,calculate,compare,complete,info,list,regress,remove,restore,server,test,verify}
...
rdiff-backup: error: argument action: invalid choice: 'testingbackup'
(choose from 'backup', 'calculate', 'compare', 'complete', 'info',
'list', 'regress', 'remove', 'restore', 'server', 'test', 'verify')
But this works with api warning:
rdiff-backup -v9 --print-statistics testingbackup testingbackup-backup