Bash and All That; Why Ancient *NIX Tools Are Still Essential

Why are we still using bash (and derivatives)? Why are make, sed, grep, and so forth at the tips of our fingers? This talk explores the qualities that keep these tools indispensable, after decades of use. How do they solve specific universal problems? How are they being used in new ways? What don't they do well? What should the "ultimate scripting language" look like?