Updated Shell material
Changes to Shell lessons
Removed unwanted data
Splitting lesson from tutorial.md into chunks based on topics
Splitting lesson from tutorial.md into chunks based on topics
Updated Shell material with data
Changes to 00-intro.md
Changed README.txt to README.md
Updated Intro material
Updated FileDir material
Minor changes to intro file
Edited File and Directories material
Created backup directory inside filesystem
Created backup directory inside filesystem
Updated material for creating things
Updated material for Pipes and filters
Updated material for Pipes and filters
Edited loops material
Updated Scripting material
Updated grep/find material