Custom motd:

http://www.raspberrypi.org/forums/viewtopic.php?t=23440

Send email from linux cli:

http://go2linux.garron.me/linux/2010/10/how-send-email-command-line-gmail-mutt-789

Mutt config:

http://www.mutt.org/doc/manual/manual-3.html

Meteotux Pi:

https://sites.google.com/site/meteotuxpi/home

Pi Logswitch:

http://kiros.co.uk/blog/controlling-log-files-on-the-raspberry-pi-using-logrotate/

http://www.thegeekstuff.com/2010/07/logrotate-examples/

Simple VPN:

http://www.thegeekstuff.com/2013/09/openvpn-setup/

IP Fowarding:

http://www.ducea.com/2006/08/01/how-to-enable-ip-forwarding-in-linux/

Logwatch configs:

http://www.debianhelp.co.uk/logwatch1.htm

http://www.linux-mag.com/id/7800/

Mount FTP or SFTP:

http://www.linuxnix.com/2011/03/mount-ftp-server-linux.html

https://wiki.archlinux.org/index.php/sshfs

Old links to be sorted:

http://www.debian-administration.org/article/28/Making_scripts_run_at_boot_time_with_Debian

http://www.linux.com/learn/tutorials/442412-managing-linux-daemons-with-init-scripts

http://www.instructables.com/id/Ultimate-Pi-Based-Home-Server/?ALLSTEPS

OpenVPN on DD-WRT:

http://www.dd-wrt.com/wiki/index.php/VPN_%28the_easy_way%29_v24%2B

http://www.dd-wrt.com/wiki/index.php/Iptables_command#Logging

https://forums.openvpn.net/topic12170.html

Stream video AND audio from Pi:

http://blog.tkjelectronics.dk/2013/06/how-to-stream-video-and-audio-from-a-raspberry-pi-with-no-latency/

Add SD Card to Linksys router:

http://www.dd-wrt.com/wiki/index.php/Linksys_WRT54G-TM_SD/MMC_mod

Increase FPS for PiCam

http://www.pyimagesearch.com/2015/12/21/increasing-webcam-fps-with-python-and-opencv/

http://www.pyimagesearch.com/2015/12/28/increasing-raspberry-pi-fps-with-python-and-opencv/

http://www.pyimagesearch.com/2016/01/04/unifying-picamera-and-cv2-videocapture-into-a-single-class-with-opencv/