Что пишет? И как он по вашему должен запуститься, он же в виде демона сделан и особо ничего выдавать не должен.
Commands:
start start in daemon mode, performing synchronization. The current
state of the daemon can be read from the file ".sync/status"
in the sync directory.
stop stop running daemon.
status display status: sync state, errors,
recently synchronized files, total and remaining space quota.
token get OAuth token, encrypt and store it in specified file (by
default - /.config/yandex-disk/passwd). If -p PASSWORD or
--password PASSWORD options are not specified, password
will be read from STDIN.
sync synchronize everything and exit (If daemon is started wait
for full sync and exit.
publish make file/folder public, output public link to STDOUT.
Object will be copied to the root of sync folder.
To overwrite existing objects use
the option --overwrite.
unpublish withdraw file from public access.
setup launch the setup wizard.
Запустите yandex-disk setup и сконфигуряйте, а демон при старте выдаст только "Starting daemon process...Done"