ubuntu 17. Please ensure your locale is set to UTF-8

[AlexeyAlexey]

When programs are run in instances that are built from boxes of ubuntu 17, there is the following issue

For example

$ elixir -v

warning: the VM is running with native name encoding of latin1 which may cause Elixir to malfunction as it expects utf8. Please ensure your locale is set to UTF-8 (which can be verified by running "locale" in your shell

I use the following strings in the preseed.cfg file to fix it

d-i debian-installer/language string en

d-i debian-installer/country string US

d-i debian-installer/locale string en_US.UTF-8

d-i localechooser/preferred-locale string en_US.UTF-8

d-i localechooser/supported-locales en_US.UTF-8

d-i keyboard-configuration/xkb-keymap select us

(https://github.com/AlexeyAlexey/packer-templates/blob/master/http/ubuntu/preseed.cfg)