解決Please check that your locale settings

今天在一個Ubuntu的虛擬機里遇到編碼相關的問題：

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LANG = "zh_CN.UTF-8"
    are supported and installed on your system.

解決辦法就是安裝zh包：

apt-get install language-pack-zh-hans

安裝完后，就可以顯示中文字符了。