When we are talking about a server, its network is the most important resource. Especially in the cloud network, when it is the only communication channel to access the server and connect with other servers in the network. The network comes under an Input/Output device category. Networks are generally slow in performance and are an unreliable communication channel. You may lose some data while in transit, data may be exposed to external entities, or a malicious guy can update original data before it reaches you.
The Ubuntu server, as well as Linux in general, provides tons of utilities to ease network monitoring and administration. This recipe covers some inbuilt tools to monitor network traffic and its performance. We will also look at a few additional tools that are worth a space on your system.