Wireshark is a network “sniffer” - a tool that captures and analyzes packets off the wire. Here is the instructions how to install it on Ubuntu.
# 1. Install the Wireshark package.sudo apt-get install wireshark
# 2. Choose to allow the nonsudo users can capture.sudo dpkg-reconfigure wireshark-common
# 3. The installation of Wireshark will create the 'wireshark' group. Run this command to make sure the 'wireshark' group is empty.grep 'wireshark' /etc/group
# 4. Add your account('auser' for an example) into the group.sudo usermod -a -G wireshark auser
# 5. Logout and login again, to make if take effect.# 6. If you want to remove WireShark, please remove the user from the group first:gpasswd -d auser wireshark