It may not necessarily be the bandwidth.
Sometimes web applications are very slow initially, but the routines are cached making them faster on subsequent page loads.
That was happening to me - and the way you can test is to clear your browser cache and reboot the linode. If that results in it being slow but subsequent reloads are fast, then it's not a bandwidth issue.
If you are using a background image, btw, you might want to instruct browsers to cache it for at least 3 months.
You can test what is making your page slow with
https://developers.google.com/speed/pagespeed/insights/