perl: warning: Setting locale failed.
　　　　　　perl: warning: Please check that your locale settings:
        　　　　　　LANGUAGE = "en_US.UTF-8",
        　　　　　　LC_ALL = "",
        　　　　　　LANG = "AMERICAN_AMERICA.UTF-8"
    　　　　are supported and installed on your system.
　　　　　 perl: warning: Falling back to the standard locale ("C").

解决办法：

设置环境变量vi  ~/.bashrc，在最后加上：

LANGUAGE = "en_US.UTF-8",

export LANG=en_US:zh_CN.UTF-8

export LC_ALL=C

然后执行 . ~/.bashrc 即时生效