Since installing Ubuntu I have been unable to install new packages, it has even failed to update. Below is a dump of connection error I see when I tried to install Wine:
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/u/unixodbc/odbcinst1debian2_2.3.1-4.1_amd64.deb Connection failed [IP: 91.189.88.152 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/f/fonts-wqy-microhei/ttf-wqy-microhei_0.2.0-beta-2_all.deb Connection failed [IP: 91.189.88.162 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
sudo apt update
and then try your original command again. Also, is your internet connection working normally?