Ever since I moved to broadband I've been looking for a traffic monitor that will show me a breakdown of my usage for not just my current session, but for the entire month (as I am on a capped plan). It hasn't been easy finding one that works in Linux as most are for system administrators, not normal end-users. Up until now I have been using kdevmon on my KDE desktop, but it resets each time I start a session, and doesn't show cumulative usage for the month. Anyway, I just came across one that does the trick. KTrafficAnalyzer is meant to provide visual feedback of your current network traffic, similar to tools like DU-Meter. In addition it provides statistics with total down and upload sums.