perl: warning: Please check that your locale settings

ОКРУЖЕНИЕ: Ubuntu 14.04.3 LTS

ЦЕЛЬ: Запускать команды без неисправленных предупреждений.

ПРОБЛЕМА: 

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_PAPER = "en_IE.UTF-8",
        LC_ADDRESS = "en_IE.UTF-8",
        LC_MONETARY = "en_IE.UTF-8",
        LC_NUMERIC = "en_IE.UTF-8",
        LC_TELEPHONE = "en_IE.UTF-8",
        LC_IDENTIFICATION = "en_IE.UTF-8",
        LC_MEASUREMENT = "en_IE.UTF-8",
        LC_TIME = "en_IE.UTF-8",
        LC_NAME = "en_IE.UTF-8",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

РЕШЕНИЕ:

apt-get install language-pack-en

Запустить команду.