Wireshark Quick Start for Ubuntu 16.04 Xenial
Hi! The Tutorial shows you Step-by-Step How to Install and Getting-Started with the Latest Wireshark Network Analizer on Ubuntu 16.04 Xenial Xerus LTS GNU+Linux Desktop.
Wireshark is the World’s foremost Network Protocol Analyzer. It lets you See what’s happening on your Network at a Microscopic Level.
Enabling this Apt PPA you’ll Get the Latest stable Wireshark releases back-ported from Debian package versions.

Open a Command Line Shell Session
Ctrl+Alt+t on Desktop
(Press “Enter” to Execute Commands)How to Enable the Latest Wireshark Apt PPA Repo
Installing Latest Wireshark for Ubuntu.
sudo apt install wireshark
If Got “User is Not in Sudoers file” then see: How to Enable sudo
Choose if Enabling the Recomended dumpcap feature…Getting-Started Capturing Live Network Data with Wireshark