1. Log into your control panel and download the client: 

https://controlpanel.newshosting.com/customer/action/downloadclient.php

2. Open terminal and navigate to the download window:

cd Downloads/
 

3. Change permissions to allow execute:

chmod 770 newshosting-2.8.10-linux-x64-installer.run
 

4. Execute installer:

./newshosting-2.8.10-linux-x64-installer.run
 

5. This should launch the installer itself and walk you through the rest of the install process. 
6. The installer will put a shortcut on your desktop to launch it again. If you would rather do so from the command line, you can do so right from your install directory.

~/newshosting-2.8.10/newshosting.sh

Please note, the Newshosting newsreader only supports the x86_64 architecture for Linux.