perl: warning: Setting locale failed.

If you are getting this annoying error on debian or proxmox or any other debian based linux distro:

perl: warning: Setting locale failed.

perl: warning: Please check that your locale settings:

LANGUAGE = (unset),

LC_ALL = (unset),

LC_CTYPE = "en_IE.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").

The fix is very simple.

me@server # locale-gen en_IE.UTF-8

Generating locales (this might take a while)...

  en_US.UTF-8... done

Generation complete.

me@server # dpkg-reconfigure locales

Select the locale and save

Generating locales (this might take a while)...

  en_IE.UTF-8... done

  en_US.UTF-8... done

Generation complete.

me@server #

And the issue should be resolved.