解决：perl: warning: Please check that your locale settings

问题：

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LC_CTYPE = "zh_CN.UTF-8",
    LC_TERMINAL_VERSION = "3.3.3beta2",
    LC_TERMINAL = "iTerm2",
    LANG = "en_US.utf8"
    are supported and installed on your system.

方法

export LC_ALL=C