Installing APT Packages
$ export DEBIAN_FRONTEND=noninteractive
3.19s$ sudo -E apt-get -yq update &>> ~/apt-get-update.log
0.74s$ sudo -E apt-get -yq --no-install-suggests --no-install-recommends $TRAVIS_APT_OPTS install cfengine-community
Reading package lists...
Building dependency tree...
Reading state information...
The following NEW packages will be installed:
0 upgraded, 1 newly installed, 0 to remove and 241 not upgraded.
Need to get 5,044 kB of archives.
After this operation, 19.3 MB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
E: There were unauthenticated packages and -y was used without --allow-unauthenticated