Doedd hi ddim yn bosib dilysu rhai pecynnau. Efallai mai problem rhwydwaith dros dro yw hon. Rho gynnig arni wedyn. Gweler isod am restr o becynnau sydd heb eu dilysu.
It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again later. See below for a list of unauthenticated packages.