There are some questions about Linux locale confused me much.

What is the difference between zh_CN.utf8 and zh_CN.UTF-8 ?

Are they the same locale ?

Run locale command:

LANG=zh_CN.UTF-8  

LANGUAGE=  

LC_CTYPE="zh_CN.UTF-8"  

LC_NUMERIC=zh_CN.UTF-8  

LC_TIME=zh_CN.UTF-8  

Run locale -a command:

C  

C.UTF-8  

en_AG  

en_AG.utf8  

POSIX  

zh_CN.gbk  

zh_CN.utf8  

POSIX  

Anther two question:

What is the difference between C and C.UTF-8 ?

What is the difference between en_AG and en_AG.UTF-8 ?