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Kim Stacks
Asked: 2018-09-22 19:54:53 +0800 CST

Fresh installation of ubuntu 16.04 gives me warning about locale. Unable to fix

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I got this on a fresh installation of Ubuntu 16.04 on AWS Lightsail

_____________________________________________________________________
WARNING! Your environment specifies an invalid locale.
 The unknown environment variables are:
   LC_CTYPE=UTF-8 LC_ALL=
 This can affect your user experience significantly, including the
 ability to manage packages. You may install the locales by running:

   sudo apt-get install language-pack-UTF-8
     or
   sudo locale-gen UTF-8

To see all available language packs, run:
   apt-cache search "^language-pack-[a-z][a-z]$"
To disable this message for all users, run:
   sudo touch /var/lib/cloud/instance/locale-check.skip
_____________________________________________________________________

Then I follow the instructions 

$ sudo apt-get install language-pack-UTF-8
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package language-pack-UTF-8

Then I tried the other one

$ sudo locale-gen UTF-8
Error: 'UTF-8' is not a supported language or locale

What should I do now?

locale

2 Answers

  1. This is a guess, since I don't know how AWS Lightsail works.

    Apparently the LC_CTYPE variable has been assigned a value ("UTF-8") which is invalid in Ubuntu. So let's clear that variable.

    Open the ~/.profile file for editing, add this line:

    unset LC_CTYPE

    and relogin.

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  2. Apparently the message left after I reboot.

    In any case, I also explicitly set the LC_CTYPE in the default locale

    sudo vim /etc/default/locale

    I typed the following

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

    sudo dpkg-reconfigure locales

    which is a screen like this enter image description here

    For such screens, you have to use tab and space and your cursor keys to navigate

    SElect the locale you want. In my case that will be en_US.UTF-8

    enter image description here

    If you do this correctly, 2 screens later you should see

    enter image description here

    Then apparently you need to sudo reboot

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