Moved here by moderator.
d00med, as a forum member for 2 years with 150+ posts you cannot be considered a newbie any more, so kindly think about where topics correctly fit instead of posting straight into 'Newbie' section.
Relevant forum rule:
 Consider Which Forum Section To Post
Posting to specific sections can make it easier for others to provide assistance and for future searches. For example, if you are having a specific software issue, post to "Software and Applications" section instead of "Newbie Questions".
In response to your question, the command
- Code: Select all
sudo lsof -i
Can be very helpful in understanding what is going on here.
If you want to investigate further then the second column of its output (PID) can be used to identify processes that are using your connection and these in turn can be stopped by identifying the PID in System Monitor and right clicking on it. You can then see what effect this has on your internet throughput. The chances are that these are processes you want to have running anyway, I did a similar investigation recently and found out it was my calendar application connecting to google calendar that was causing curious usage patterns.
If you find a command running that you do not understand simply put its name into google search.
Fujitsu Lifebook AH532 Laptop. Intel i5 processor, 6Gb ram, Intel HD3000 graphics, Intel Audio/wifi. Realtek RTL8111/8168B Ethernet.Ubuntu12.10 (Unity), Mint14 (Cinnamon), Manjaro (Xfce).