Package: openssh-client Severity: normal I just noticed this as well: stable doesn't seem to have a version of openssh-client that has either the backported patch or anything to ignore ControlPersist. On a system running squeeze: ~$ ssh localhost /home/josh/.ssh/config: line 66: Bad configuration option: ControlPersist /home/josh/.ssh/config: terminating, 1 bad configuration options - Josh Triplett