perl: warning: Setting locale failed

はじめに

Raspberry piでapt updateした際など、下記の警告が発生した際の解決方法です。

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_CTYPE = "UTF-8",
	LANG = "en_GB.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_GB.UTF-8").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
/usr/bin/locale: Cannot set LC_CTYPE to default locale: No such file or directory
/usr/bin/locale: Cannot set LC_ALL to default locale: No such file or directory

手順

下記コマンドを実行。

$ sudo raspi-config
# 5. localisation Options

$ sudo vi /etc/default/locale
#  File generated by update-locale
LANG=en_GB.UTF-8
LANGUAGE=en_GB.UTF-8
LC_ALL=en_GB.UTF-8