Possible Duplicate:Is there any book , Tutorial on very very advanced shell scripting Is there a way/book to learn advanced usage of shell by practice? I find that most shell programming books only teach you the grammar of shell script. Grammar is important but as in C programming the standard library is also important. 
Advanced usage/command of shell
bash;shell;learning
All I've ever wanted to learn about the shell (BASH) can be found in Advance Bash Scripting Guide http://tldp.org/LDP/abs/html/. There are a myriad of examples here as well.It includes all the sematics and information about the standard library you can find here http://www.gnu.org/manual/manual.htmlHope this will help you.