修正 Raspberry Pi setlocale 警告訊息

When I login my Raspberry Pi and always found this warning in my screen:

-bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

I found a solution from Gist and just note it:

$ echo "LC_ALL=en_US.UTF-8" | sudo tee -a /etc/environment > /dev/null
$ echo "en_US.UTF-8 UTF-8" | sudo tee -a /etc/locale.gen > /dev/null
$ echo "LANG=en_US.UTF-8" | sudo tee /etc/locale.conf > /dev/null
$ sudo locale-gen en_US.UTF-8

That's all.

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