错误提示：
perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US:en", LC_ALL = (unset), LC_PAPER = "en_US", LC_ADDRESS = "en_US", LC_MONETARY = "en_US", LC_NUMERIC = "en_US", LC_TELEPHONE = "en_US", LC_IDENTIFICATION = "en_US", LC_MEASUREMENT = "en_US", LC_TIME = "en_US", LC_NAME = "en_US", LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C").
解决办法：
apt-get install language-pack-en-base
/usr/sbin/locale-gen en_US.UTF-8
/usr/sbin/update-locale LANG =en_US.UTF-8
最后：reboot