Historic bandwidth usage
The graphs from the Analytics tab on your Linode's Dashboard should offer all the information you need.
- Navigate to your Linode's Dashboard.
- Choose the Analytics tab.
- Use the dropdown to select your timeframe.
This should offer the data you need. If you would like more data, I recommend looking into the Longview service:
Longview is a bit more extensive than the Cloud Manager graphs and can be more customizable too.