Bash Startup Files (Bash Reference Manual)| www.gnu.org
Shell Scripts (Bash Reference Manual)| www.gnu.org
The Restricted Shell (Bash Reference Manual)| www.gnu.org
Bash POSIX Mode (Bash Reference Manual)| www.gnu.org
The Shopt Builtin (Bash Reference Manual)| www.gnu.org
The Set Builtin (Bash Reference Manual)| www.gnu.org