1. 查看当前语言
   locale

LANG=
LANGUAGE=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=

2. 查看当前已安装的语言
   locale -a

C
C.UTF-8
POSIX

3. 安装语言包
   apt-get install language-pack-zh-hans
locale-gen zh_CN.UTF-8
   再次查看
   locale -a

C
C.UTF-8
POSIX
zh_CN.utf8
zh_SG.utf8

4. 添加到文件
   echo "export LC_ALL=zh_CN.UTF-8">> /etc/profile
source /etc/profile
   如果这里添加失败，提示没有这种语言包，退出容器，再重新进入，就可以添加了
5. 完成
   locale

LANG=
LANGUAGE=
LC_CTYPE="zh_CN.UTF-8"
LC_NUMERIC="zh_CN.UTF-8"
LC_TIME="zh_CN.UTF-8"
LC_COLLATE="zh_CN.UTF-8"
LC_MONETARY="zh_CN.UTF-8"
LC_MESSAGES="zh_CN.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=zh_CN.UTF-8