ostree-admin-pin - Explicitly retain deployment at a given index

       Ensures the deployment at INDEX, will not be garbage collected by default. This is termed "pinning". If
       the -u option is provided, undoes a pinning operation.  INDEX can be >= 0 or one of booted, pending or
       rollback strings.

       ostree-admin-pin - Explicitly retain deployment at a given index

--unpin,-u
           Undoes a pinning operation.

OSTree                                                                                       OSTREEADMINPIN(1)

ostreeadminpin {INDEX}