perl: warning: Falling back to the standard locale ("C")

perl: warning: Falling back to the standard locale ("C").
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LANG = "zh_CN.GB2312;zh_CN.UTF-8;en_US;en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

修改 vi /etc/default/locale

添加 LC_ALL="C"