Ubuntu 16 not displaying Cyrillic?

Question

ubuntu

When executing the command "dpkg-reconfigure locales"
I choose ruUTF8, then by default I also set ruutf8
and this is what it gives:
-bash: warning: setlocale: LC_ALL: cannot change locale (ru-RU.UTF-8)
-bash: warning: setlocale : LC_ALL: cannot change locale (ru-RU.UTF-8)
[email protected]:~# dpkg-reconfigure locales
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = "en-RU.UTF-8",
LANG = (unset)
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale
: Cannot set LC_ALL to default locale: No such file or directory
/usr/bin/locale: Cannot set LC_CTYPE to default locale: No such file or director y
/usr /bin/locale: Cannot set LC_MESSAGES to default locale: No such file or direc tory
/usr/bin/locale: Cannot set LC_ALL to default locale: No such file or directory
Generating locales (this might take a while)...
en_AG .UTF-8... done
en_AU.UTF-8... done
en_BW.UTF-8... done
en_CA.UTF-8... done
en_DK.UTF-8... done
en_GB.UTF-8. .. done
en_HK.UTF-8... done
en_IE.UTF-8... done
en_IN.UTF-8... done
en_NG.UTF-8... done
en_NZ.UTF-8... done
en_PH.UTF-8... done
en_SG.UTF-8... done
en_US.UTF-8... done
en_ZA.UTF-8 ... done
en_ZM.UTF-8... done
en_ZW.UTF-8... done
ru_RU.ISO-8859-5... done
ru_RU.CP1251... done
ru_RU.KOI8-R... done
ru_RU .UTF-8... done
ru_UA.KOI8-U... done
ru_UA.UTF-8... done
Generation complete.
[email protected]:~#

Answer 1

the locale is not ru - RU.UTF-8 but ru _ RU.UTF-8 An
underscore between "ru" and "RU", not a hyphen.
Even in the list of generated ones it says "ru_RU.UTF-8... done" , was it hard to copy?

Answer 2

And what's the problem? Where exactly Cyrillic is not displayed?