Shell configurations

According to Bash’s man:

• /bin/bash The bash executable
• /etc/profile The system-wide initialization file, executed for login shells
• ~/.bash_profile The personal initialization file, executed for login shells
• ~/.bashrc The individual per-interactive-shell startup file
• ~/.bash_logout The individual login shell cleanup file, executed when a login shell exits
• ~/.inputrc Individual readline initialization file

With zsh, .zshrc is always read for an interactive shell, whether it’s a login one or not.