If you don't care to click on the OP's pay-per-download link: https://secure2.linuxjournal.com/pdf/dljdownload.php
You can directly save the file to Dropbox.
BTW: Linux Journal is an important part of the Linux story, personally I've learned a lot from time to time searching or surfing the Internet (since 2001). Haven't really subscribed to the magazine but I would like to show my respect to LJ by buying the entire digital archive. I really hope some rich Silicon Valley dude can pick it up and continue the Linux Journal journey.