tail /var/log/ee/ee.log
libboost-thread1.54.0 libgflags2 libgoogle-glog0 libicu52 libjemalloc1
libmemcached10 libtbb2 libunwind8 libyaml-0-2
0 upgraded, 15 newly installed, 0 to remove and 132 not upgraded.
Need to get 24.3 MB of archives.
After this operation, 31.8 MB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
hhvm
E: There are problems and -y was used without --force-yes
2015-07-26 03:03:49,712 (INFO) ee : Oops Something went wrong!!
2015-07-26 03:03:49,712 (ERROR) ee : Check logs for reason tail /var/log/ee/ee.log
& Try Again!!!