perl: warning: Setting locale failed.

Problem:

perl: warning: Setting locale failed.perl: warning: Please check that your locale settings:LANGUAGE = "en_US:en",LC_ALL = (unset),LC_PAPER = "zh_CN.UTF-8",LC_ADDRESS = "zh_CN.UTF-8",LC_MONETARY = "zh_CN.UTF-8",LC_NUMERIC = "zh_CN.UTF-8",LC_TELEPHONE = "zh_CN.UTF-8",LC_IDENTIFICATION = "zh_CN.UTF-8",LC_MEASUREMENT = "zh_CN.UTF-8",LC_TIME = "zh_CN.UTF-8",LC_NAME = "zh_CN.UTF-8",LANG = "en_US.UTF-8"    are supported and installed on your system.perl: warning: Falling back to the standard locale ("C").

Solution:

sudo locale-gen zh_CN.UTF-8 en_US.UTF-8

References:

How can I fix a locale warning from perl?

Fixing “No such file or directory” locale errors