Debian 7: (Wheezy): http://repos.rcn-ee.net/debian/
deb [arch=armhf] http://repos.rcn-ee.net/debian/ wheezy main
#deb-src [arch=armhf] http://repos.rcn-ee.net/debian/ wheezy main
Debian 8: (Jessie): http://repos.rcn-ee.net/debian/
deb [arch=armhf] http://repos.rcn-ee.net/debian/ jessie main
#deb-src [arch=armhf] http://repos.rcn-ee.net/debian/ jessie main
Ubuntu 14.04 lts: (Trusty): http://repos.rcn-ee.net/ubuntu/
deb [arch=armhf] http://repos.rcn-ee.net/ubuntu/ trusty main
#deb-src [arch=armhf] http://repos.rcn-ee.net/ubuntu/ trusty main
Ubuntu 14.10: (Utopic): http://repos.rcn-ee.net/ubuntu/
deb [arch=armhf] http://repos.rcn-ee.net/ubuntu/ utopic main
#deb-src [arch=armhf] http://repos.rcn-ee.net/ubuntu/ utopic main
Ubuntu 15.04: (Vivid): http://repos.rcn-ee.net/ubuntu/
deb [arch=armhf] http://repos.rcn-ee.net/ubuntu/ vivid main
#deb-src [arch=armhf] http://repos.rcn-ee.net/ubuntu/ vivid main
keyring:
sudo apt-get install rcn-ee-archive-keyring