This document contains a set of frequently-asked questions concerning Bash, the GNU Bourne-Again Shell. Bash is a free and default command interpreter with advanced features for both interactive use and shell programming under Linux. Also don’t forget TLDP bash guide / Advanced Bash-Scripting Guide.
The Flashback Trojan, is a trojan horse affecting personal computer systems running Apple Mac OS X. More than half a million Apple computers have been infected with the Flashback Trojan.