also check as CRAN
also check against R-devel
install r-recommended instead of explicitly naming all packages
test for showing contents of sources.list.d
more test output
run update only for selected repositories
bugfix: proper redirection
bugfix: sudo
help output for dd
Revert "help output for dd"

This reverts commit 3dab38e5bb7f5c23c948ff7c700f23719d219058.
bugfix: use supported setting for dd
add key before update
do dist-upgrade instead of upgrade