Syntax Check
perl -c filename.pl
php -l filename.pl
bash -n filename.sh
For javascript, you need to follow instruction from http://developer.mozilla.org/en/docs/Introduction_to_the_JavaScript_shell#Getting_and_building_the_JavaScript_shell to install the SpiderMonkey JavaScript Shell and
alias jscheck='/home/khai/jsshell/mozilla/js/src/Linux_All_DBG.OBJ/js -C -f'
jscheck filename.js
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