ssh树苺派问题：-bash: warning: setlocale: LC_ALL: cannot change locale (zh_CN)

1 问题描述

MAC、Ubuntu16.04通过ssh方式连接树苺派4B时，均出现如下问题：
（1）warning

-bash: warning: setlocale: LC_ALL: cannot change locale (zh_CN)

（2）在终端中，无法正常显示中文。

其中，树苺派locale如下

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
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_US.UTF-8
LANGUAGE=zh_CN
LC_CTYPE="zh_CN"
LC_NUMERIC="zh_CN"
LC_TIME="zh_CN"
LC_COLLATE="zh_CN"
LC_MONETARY="zh_CN"
LC_MESSAGES="zh_CN"
LC_PAPER="zh_CN"
LC_NAME="zh_CN"
LC_ADDRESS="zh_CN"
LC_TELEPHONE="zh_CN"
LC_MEASUREMENT="zh_CN"
LC_IDENTIFICATION="zh_CN"
LC_ALL=zh_CN

Ubuntu的locale如下：

LANG=en_US.UTF-8
LANGUAGE=en
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=zh_CN.UTF-8
LC_TIME=zh_CN.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=zh_CN.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=zh_CN.UTF-8
LC_NAME=zh_CN.UTF-8
LC_ADDRESS=zh_CN.UTF-8
LC_TELEPHONE=zh_CN.UTF-8
LC_MEASUREMENT=zh_CN.UTF-8
LC_IDENTIFICATION=zh_CN.UTF-8
LC_ALL=

MAC的locale如下：

LANG=
LC_COLLATE="C"
LC_CTYPE="UTF-8"
LC_MESSAGES="C"
LC_MONETARY="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_ALL=

2 问题一 解决方法

ssh链接树苺派，输入以下命令

sudo dpkg-reconfigure locales

在最后设置默认序言选择en_US.UTF-8，很重要！！！
将会执行如下：

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = "zh_CN",
	LC_ALL = "zh_CN",
	LC_ADDRESS = "zh_CN.UTF-8",
	LC_NAME = "zh_CN.UTF-8",
	LC_MONETARY = "zh_CN.UTF-8",
	LC_PAPER = "zh_CN.UTF-8",
	LC_IDENTIFICATION = "zh_CN.UTF-8",
	LC_TELEPHONE = "zh_CN.UTF-8",
	LC_MEASUREMENT = "zh_CN.UTF-8",
	LC_TIME = "zh_CN.UTF-8",
	LC_NUMERIC = "zh_CN.UTF-8",
	LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
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
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 directory
/usr/bin/locale: Cannot set LC_MESSAGES to default locale: No such file or directory
/usr/bin/locale: Cannot set LC_ALL to default locale: No such file or directory
Generating locales (this might take a while)...
  en_US.UTF-8... done
  zh_CN.GB2312... done
  zh_CN.GB18030... done
  zh_CN.GBK... done
  zh_CN.UTF-8... done
Generation complete.

再查看树苺派的locale，输入

locale

将会正确显示信息如下

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

再重新ssh链接，无之前的warning。

2 问题二 解决方法

可在主菜单中点击【Menu->Preferences->Raspberry Pi Configuraction->Localisaction->Set Locale】将系统语言设置成英文
language:EN（English）
country：US
character-set: utf-8
以上，即将系统设置为全英文，重启后生效。
ssh链接，正常显示英文。
树苺派locale如下：

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