1. USB FunctionFS
https://www.kernel.org/doc/Documentation/usb/functionfs.txt
2. TCP Keepalive HOWTO
http://www.tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/
3. Smack.txt
https://www.kernel.org/doc/Documentation/security/Smack.txt
4. Socket Activation
http://0pointer.de/blog/projects/socket-activation.html
5. Socket Activation, part II
http://0pointer.de/blog/projects/socket-activation2.html
6. Converting inetd Services
http://0pointer.de/blog/projects/inetd.html
7. Socket Activated Internet Services and OS Containers
http://0pointer.de/blog/projects/socket-activated-containers.html