test

changes

correcting change history

closes #16 ; added:[arithmetic expansion, grep recursively search, command substitution example]

closes #11 ; added:[ANSI C quoting]

closes #15 , closes #17 , closes #18, closes #20 ; added:[brace expansion, find piped to xargs, herestrings, awk example]

closes #4 ; added command grouping

closes #10 ; added chown, chmod and du

closes #9 ; added curl and wget; added & to start a background job

closes #6 , closes #7 ; read should be used with option -r ; used appropriate variable names in for loop example;

closes #2, closes #3 ; Updated variable DATE to thedate. Uppercase variables are conventionally used for environment variables. Added $() for command substitution. backticks are discouraged; replaced -a with -e

closes #19, closes #13, closes #14; fixed typo for cd to root directory ; added section for special shell variables and exit codes ;

Added wait, globbing, grep -o; fixed typos

Update README.md

Initial commit