Below are links to Linux Magazine. Please let me know if you know more and I am happy to add them to the list.
Linux Journal: http://www.linuxjournal.com/
Linux Magazine: http://www.linux-magazine.com/
Linux Mag: http://www.linux-mag.com/
Linux Format http://www.linuxformat.co.uk/index.php
Linux Gazette http://linuxgazette.net/
Linux User http://www.linux-user.de/
Full Circle Magazine http://fullcirclemagazine.org/
Linux Weekly News http://lwn.net/
Linux Today http://www.linuxtoday.com/
Linux World http://www.linuxworld.com/
Linux Focus http://www.linuxfocus.org/
Linux for you http://www.linuxforu.com/