Ubuntu: Locale Issue

I was encountering a locale issue on my Ubuntu server earlier. The error looks something like this:

unsupported locale setting
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/CommandNotFound/util.py", line 24, in crash_guard
    callback()
  File "/usr/lib/command-not-found", line 69, in main
    enable_i18n()
  File "/usr/lib/command-not-found", line 40, in enable_i18n
    locale.setlocale(locale.LC_ALL, '')
  File "/usr/lib/python3.3/locale.py", line 541, in setlocale
    return _setlocale(category, locale)
locale.Error: unsupported locale setting

This was caused by these missing locale settings: LC_ALL and LANG. One way to solve this is by adding an export line for these variables on ~/.bash_profile or ~/.bashrc file.

export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8

But because I don’t want to be doing this for all my (future) users, I had to look for a config file which would have a system-wide effect.

I found out about /etc/environment which is used for system-wide environment setting. I managed to solve the issue by appending these in that file.

LC_ALL=en_US.UTF-8
LANG=en_US.UTF-8