sudo /usr/sbin/locale-gen
Password:
Generating locales...
  ru_RU.UTF-8...character map file `UTF-8' not found: No such file or directory
default character map file `ANSI_X3.4-1968' not found: No such file or directory

locale -a
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
C
POSIX