When you begin a fresh installation with Pacman, it asks you if you trust the caches from which the software will come. For example:
> pacman -get http://vdt.cs.wisc.edu/vdt_200_cache:VDT Do you want to add [http://vdt.cs.wisc.edu/vdt_200_cache] to [trusted.caches]? (y or n):
You can avoid this question with an extra option, -trust-all-caches.
For example:
> pacman -trust-all-caches -get http://vdt.cs.wisc.edu/vdt_200_cache:VDT
In VDT 2.0.0, we have removed installation time questions. All services will default to be disabled after installation. The only remaining question is whether you agree to the licenses, which is necessary to answer before installing any components. You can read the licenses here, and if you agree, you can answer this question preemptively by setting the VDTSETUP_AGREE_TO_LICENSES environment variable to 'y'. If the environment variable is not set, you will be prompted for your answer during installation.
Bourne shell:
VDTSETUP_AGREE_TO_LICENSES=y export VDTSETUP_AGREE_TO_LICENSES
csh:
setenv VDTSETUP_AGREE_TO_LICENSES y