Bash: about .bashrc, .bash_profile, .profile, /etc/profile, etc/bash.bashrc and others

• http://stackoverflow.com/questions/415403/whats-the-difference-between-bashrc-bash-profile-and-environment
• http://stackoverflow.com/questions/6372751/what-is-the-difference-between-the-various-shell-profiles
• http://unix.stackexchange.com/questions/40708/what-is-the-difference-between-profile-bashrc-bash-profile-gnomer
• http://superuser.com/questions/183870/difference-between-bashrc-and-bash-profile