linux shell Learning Program

Because of work requirements, so we plan to learn linux shell system all of a sudden, after all, more practical shell, and the threshold seems to be a little easier than other programming languages.
Approximate line is given as follows:
(. 1) and a background shell Linux operating mechanisms for performing the shell
(2) basic grammar A (variables, expressions, parameter passing, etc.)
control structure (3) basic grammar B (like the cycle is determined, functions, etc.)
(4) 3 large regular expression magic
(5) advanced regular expression
(6) linux shell script combat (such as some of the script monitor system resources, issued a batch configuration, batch configuration check script, stress test script execution etc. ~)