Here is a nice program for reading and converting all your pdf files to epub for you ereader and Android devices. The program is called Calibre, and to install it just type this command in a terminal.

sudo python -c "import sys; py3 = sys.version_info[0] > 2; u = __import__('urllib.request' if py3 else 'urllib', fromlist=1); exec(u.urlopen('').read()); main()"
Type in your password and just take the default setting. It will download and install.
calibre splash screen.jpg
After you have it installed just select your pdf file and open it with Calibre. Once it is open select your file from the list and right click and convert it. Or select the file and click on the “Convert books” icon at the top tool bar.
calibre toolbar.jpg
If you are like me and have many back issues of Full Circle and Linux Journey Magazines you can convert them to epub file and upload them to you ereader an Android devices.