HINTS
Load order
zsh sh
/etc/zshenv /etc/profile
~/.zshenv ~/.profile
/etc/zprofile (login)
~/.zprofile (login)
/etc/zshrc (iact)
~/.zshrc (iact)
/etc/login (login)
~/.zlogin (login)
/etc/zlogout (exit)
~/.zlogout (exit)