https://www.humblebundle.com/books/unix-book-bundle?imm_mid=0eb37f&cmp=em-pr... O'Reilly Unix Humble Book Bundle supporting Code for America Unix in a Nutshell (4th). sed & awk (2nd). lex and yacc (2nd) Learning the bash shell (3rd) >=USD1 bash Cookbook. Classic Shell Script. Learning GNU Emacs (3rd). Unix Power Tools Learning the vi & vim Editors (7th) >= USD8 Bash Pocket Reference (2nd). Learning Unix for OS X (2nd) Essential Sys. Admin. (3rd). TCP/IP Network Admin. (3rd). DNS & Bind (5th). Network Troubleshooting Tools >= USD15 Espotek Labrador USD29 Electronics hackerboard http://hackerboards.com/open-source-lab-on-a-board-costs-29/ http://espotek.com/labrador/# (Monash Grad. in Melbourne, funded, OpenSource software - including Linux) USB connected Oscilloscope – 2-channel, 750ksps Arbitrary Waveform Generator – 2-channel, 1MSPS Logic Analyzer — 2-channel, 3MSPS per channel, with serial decoding Multimeter — V/I/R/C Digital outputs — 4x programmable 3.3VDC outputs Power Supply — 4.5 to 15V, 1.5W max, closed-loop