Here is how to download and extract a file on Ubuntu server
Login to ssh
login as: root
root@stoli.serverfarm.com's password:
Welcome to Ubuntu 12.04.5 LTS (GNU/Linux 2.6.32-042stab083.2 x86_64)
* Documentation: https://help.ubuntu.com/
No mail. Last login: Tue Jul 5 21:49:35 2016 from 41.203.71.186
root@stoli:~# sudo apt-get update
root@stoli:~# sudo apt-get install wget
root@stoli:~# sudo apt-get install zip unzip
root@stoli:~# sudo wget http://serverfarm.io/archive.zip
root@stoli:~# ls
archive.zip Maildir virtualmin-install.log
root@stoli:~# sudo unzip archive.zip