wireshark

Ubuntu / Debian SO

sudo apt-get install wireshark

Allow non sudo users

if during the installation you did not allowed run:

sudo dpkg-reconfigure wireshark-common

Add user to wireshark group

sudo nano /etc/group

or

sudo usermod -a -G wireshark $USER

Aply change reboot system or logout with this command

Desktop

gnome-session-quit --logout --no-prompt

Server

pkill -KILL -u $USER

User guide: www.wireshark.org