perl: warning: Falling back to the standard locale ("C").

locale-c

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Debian/Ubuntu 安装后并不一定提供了完整的语言支持，因此需要手动安装：

locale-gen en_US.UTF-8
export LANGUAGE=en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
locale-gen en_US.UTF-8
dpkg-reconfigure locales

thanks man

Thank you

It works ! thanks.

thanks

Since I do not have administrator rights, it will be "Permission denied" when I try to run locale-gen en_US.UTF-8.
I add these three lines to my shell and it works!
Thanks!!!

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

Help
bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)

Also
dpkg-reconfigure locales command not found

Not solve the problam

bash: warning: setlocale: LC_ALL: cannot change locale (en_US.UTF-8)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US.UTF-8",
LC_ALL = "en_US.UTF-8",
LC_ADDRESS = "en_IN.UTF-8",
LC_NAME = "en_IN.UTF-8",
LC_MONETARY = "en_IN.UTF-8",
LC_PAPER = "en_IN.UTF-8",
LC_IDENTIFICATION = "en_IN.UTF-8",
LC_TELEPHONE = "en_IN.UTF-8",
LC_MESSAGES = "en_IN.UTF-8",
LC_MEASUREMENT = "en_IN.UTF-8",
LC_CTYPE = "en_IN.UTF-8",
LC_TIME = "en_IN.UTF-8",
LC_COLLATE = "en_IN.UTF-8",
LC_NUMERIC = "en_IN.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

usage: vncserver

8 years later... WTF!!!

1. sudo apt install locales-all
2. add this to /etc/environment

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

reload, if not work run this:

locale-gen en_US.UTF-8
dpkg-reconfigure locales

you can try this

export LC_ALL=C

after that run this again

locale-gen en_US.UTF-8
export LANGUAGE=en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
locale-gen en_US.UTF-8
dpkg-reconfigure locales