My Job Interview at Google - good coders code, great reuse

http://www.catonmat.net/blog/my-job-interview-at-google/

Bash One-Liners Explained, Part II: Working with strings - good coders code, great reuse

New things.

http://www.catonmat.net/blog/bash-one-liners-explained-part-two/

Bash One-Liners Explained, Part I: Working with files - good coders code, great reuse

Unique content.

http://www.catonmat.net/blog/bash-one-liners-explained-part-one/

Which files/dirs waste my disk space | commandlinefu.com

http://www.commandlinefu.com/commands/view/12948/which-filesdirs-waste-my-disk-space

fish unix shell

Use it.

http://fishshell.com/

OpenRefine working with messy data

http://openrefine.org/

Tabula

http://tabula.nerdpower.org/

Extract tables from PDF FILES.