How to fix a locale setting warning from Perl?

Question

When I run perl, I get the warning:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset         


        

Answer 1

If you don't care about the locale issue, you can set PERL_BADLANG=0. Of course, this could result in incorrect localisation.

Answer 2

You need to configure locale appropriately in /etc/default/locale, logout, login, and then run the regular commands

root@host:~# echo -e 'LANG=en_US.UTF-8\nLC_ALL=en_US.UTF-8' > /etc/default/locale
root@host:~# exit
local-user@local:~$ ssh root@host
root@host:~# locale-gen en_US.UTF-8
root@host:~# dpkg-reconfigure locales

Answer 3

Adding the following to /etc/environment fixed the problem for me on Debian and Ubuntu (of course, modify to match the locale you want to use):

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

Answer 4

Use:

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

It works for Debian. I don't know why - but locale-gen had not results.

Important! It's a temporary solution. It has to be run for each session.

Answer 5

This generally means you haven't properly set up locales on your Linux box.

On Debian or Ubuntu, that means you need to do

$ sudo locale-gen
$ sudo dpkg-reconfigure locales

See also man locale-gen.

Answer 6

For anyone connecting to DigitalOcean or some other Cloud hosting provider from the iTerm2.app on MacOS High Sierra and getting this error on some commands:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
    LANGUAGE = (unset),
    LC_ALL = (unset),
    LC_CTYPE = "UTF-8",
    LANG = "en_US.UTF-8"
  are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_US.UTF-8").

This fixed the problem for me:

I know this thread is old but maybe somebody will find this useful. I know how annoying this can be.