Shell Ninja

Why ?

Shell is everywhere
It's the least common denominator
Fast turnarounds

History

sh by Ken Thomson

Year: 1971
CLI
Input/Output redirection
No variables, no pipeline

Bourne Shell by Stephen Bourne

Year: 1979
Advanced control flows
Vars and envs
Signal Handling

csh by Bill Joy

Year: 1979
C-like syntax
Aliases
History
~
Job control

bash by Brian Fox

Year: 1989
CLI completion
Brace extension
trap
Here documents ..