The link to the bug tracking system on the linux webpage gives a 404 error:
Specifically: http://www.linuxcnc.org/index.php/english/community
Link titled 'Bug Reports and Feature Requests are handled by the Source Forge Tracking System. ' linking to http://sourceforge.net/tracker/?group_id=6744.
Correct link should point to 'https://sourceforge.net/p/emc/bugs/'
Fixed