#locale
LANG=en_US.UTF-8
LC_CTYPE=
LC_NUMERIC=
LC_TIME=
LC_COLLATE=
LC_MONETARY=
LC_MESSAGES=
LC_PAPER=
LC_NAME=
LC_ADDRESS=
LC_TELEPHONE=
LC_MEASUREMENT=
LC_IDENTIFICATION=
LC_ALL=

#locale -a
C
en_US.utf8
POSIX
ru_RU.utf8

#grep en_US.UTF-8 /etc/locale.gen
#  en_US.UTF-8 UTF-8
en_US.UTF-8 UTF-8

#grep ru_RU.UTF-8 /etc/locale.gen
ru_RU.UTF-8 UTF-8

#cat /etc/locale.conf
LANG=en_US.UTF-8