出现的问题:

?? ~ ls

zsh: command not found: ls

?? ~ dir

zsh: command not found: dir

?? ~ cat .zshrc

zsh: command not found: cat

?? ~ vi .zshrc

zsh: command not found: vi

?? ~ open

zsh: command not found: open

解决方案:

PATH=/bin:/usr/bin:/usr/local/bin:${PATH}