问题
运行命令时，oh-my-zsh 冒出下面一大堆提示：
[oh-my-zsh] Insecure completion-dependent directories detected:
drwxr-xr-x 16 duke staff 512 Jul 14 10:14 /Users/duke/.oh-my-zsh
drwxr-xr-x 250 duke staff 8000 Jul 14 10:14 /Users/duke/.oh-my-zsh/plugins
drwxr-xr-x 4 duke staff 128 Jul 14 10:14 /Users/duke/.oh-my-zsh/plugins/git
drwxr-xr-x 3 duke staff 96 Jun 17 11:33 /usr/local/share/zsh
drwxr-xr-x 6 duke staff 192 Oct 3 10:04 /usr/local/share/zsh/site-functions
lrwxr-xr-x 1 duke staff 39 Jun 17 11:37 /usr/local/share/zsh/site-functions/_brew -> ../../../Homebrew/completions/zsh/_brew
lrwxr-xr-x 1 duke staff 44 Jun 17 11:37 /usr/local/share/zsh/site-functions/_brew_cask -> ../../../Homebrew/completions/zsh/_brew_cask
lrwxr-xr-x 1 duke staff 58 Oct 3 10:04 /usr/local/share/zsh/site-functions/_git -> ../../../Cellar/git/2.19.0_2/share/zsh/site-functions/_git
[oh-my-zsh] For safety, we will not load completions from these directories until
[oh-my-zsh] you fix their permissions and ownership and restart zsh.
[oh-my-zsh] See the above list for directories with group or other writability.
[oh-my-zsh] To fix your permissions you can do so by disabling
[oh-my-zsh] the write permission of "group" and "others" and making sure that the
[oh-my-zsh] owner of these directories is either root or your current user.
[oh-my-zsh] The following command may help:
[oh-my-zsh] compaudit | xargs chmod g-w,o-w
[oh-my-zsh] If the above didn't help or you want to skip the verification of
[oh-my-zsh] insecure directories you can set the variable ZSH_DISABLE_COMPFIX to
[oh-my-zsh] "true" before oh-my-zsh is sourced in your zshrc file.