Ubuntu locales (设置语言)

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

$ sudo locale-gen zh_CN zh_CN.UTF-8

Generating locales...
  zh_CN.GB2312... done
  zh_CN.UTF-8... done
Generation complete.

$ sudo dpkg-reconfigure locales

Generating locales...
  en_AG.UTF-8... done
  en_AU.UTF-8... done
  en_BW.UTF-8... done
  en_CA.UTF-8... done
  en_DK.UTF-8... done
  en_GB.UTF-8... done
  en_HK.UTF-8... done
  en_IE.UTF-8... done
  en_IN.UTF-8... done
  en_NG.UTF-8... done
  en_NZ.UTF-8... done
  en_PH.UTF-8... done
  en_SG.UTF-8... done
  en_US.UTF-8... done
  en_ZA.UTF-8... done
  en_ZM.UTF-8... done
  en_ZW.UTF-8... done
  zh_CN.GB2312... up-to-date
  zh_CN.UTF-8... up-to-date
Generation complete.