在Centos把shell改为zsh后，出现了下面这个waring信息，虽不影响使用，但看着实在是烦人.
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = "UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
查了一些资料，可以通过在.zshrc中增加两行配置来解决这个问题
LC_CTYPE=en_US.UTF-8
LC_ALL=en_US.UTF-8