Change Cygwin ls colors

1. first, put the following lines in your .bashrc

alias ls='ls --color=auto -F --group-directories-first'

eval `dircolors -b /etc/DIR_COLORS`

2. edit /etc/DIR_COLORS`

Before I found that there are some directories always with green background, very annoying, take a good look, found the reason, I don't have enough permissions for these folders, so chmod 755 do it.