[rdslw]

does bupstash has 'append-only' mode, or to put it differently: how can I achieve sth similar (ability to do backups, but not to meddle with previous ones) with bupstash features (roles/diff keys etc) ?

[andrewchambers]

Yes it does - via ssh force commands. In the hosted version you just tick a checkbox in the web ui for each ssh key.