learning shell scripting

Working with comparis operations
http://tldp.org/LDP/abs/html/comparison-ops.html

15 Practical Grep Command Examples In Linux / UNIX

http://www.thegeekstuff.com/2009/03/15-practical-unix-grep-command-examples/

Ksh Read a File Line By Line ( UNIX Scripting )/usage of IFS input field separator

/reading the line into fields.

http://www.cyberciti.biz/faq/ksh-read-file/