The file /etc/apt/preferences allows you to only update certain packages by
assigning a value to a version or repository.  The concept is quite
confusing but manageable if you read up on "man apt_preferences" and try to
follow the examples.

I think there are other ways to use aptitude and apt to hold on some updates
and apply the one you want but usually you will want to keep the settings
over some period of time.

          The following record assigns a low priority to all package
versions
          belonging to any distribution whose Archive name is "unstable".

          Package: *
          Pin: release a=unstable
          Pin-Priority: 50

          The following record assigns a high priority to all package
versions
          belonging to any release whose Archive name is  "stable"  and
whose
          release Version number is "3.0".

          Package: *
          Pin: release a=stable, v=3.0
          Pin-Priority: 500


-- 
Jeff Rasmussen
GPG public key 0x9686C12F
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