Shell里面打印utf 8字符

有一天突发奇想，怎么在shell里面打印utf-8字符呢？搜索下了发现不少办法。

1. 使用echo 和printf
   例如打印欧元符号，首先通过网页
   https://www.w3schools.com/charsets/ref_utf_currency.asp
   可以查到欧元的dec是8364, hex是20ac.

    root@kali:/usr/local/src/py/project_dirs# printf '\U20AC\n'
    €
    root@kali:/usr/local/src/py/project_dirs# printf '\u20ac\n'
    €
    root@kali:/usr/local/src/py/project_dirs# echo -e '\u20ac'
    €
    root@kali:/usr/local/src/py/project_dirs# echo -e '\U20AC'
    €
   

2. 使用python

    root@kali:~# ipython3
    Python 3.6.6 (default, Jun 27 2018, 14:44:17) 
    Type "copyright", "credits" or "license" for more information.
   
    IPython 5.5.0 -- An enhanced Interactive Python.
    ?         -> Introduction and overview of IPython's features.
    %quickref -> Quick reference.
    help      -> Python's own help system.
    object?   -> Details about 'object', use 'object??' for extra details.
   
    In [1]: chr(0x20ac)
    Out[1]: '€'
   
    In [2]: chr(8364)
    Out[2]: '€'
   

3. 使用unicode.
   在kali linux上安装unicode 很简单.

    apt-get install unicode
   
    root@kali:/usr/local/src/py/project_dirs# unicode 20ac
    U+20AC EURO SIGN
    UTF-8: e2 82 ac UTF-16BE: 20ac Decimal: € Octal: \020254
    €
    Category: Sc (Symbol, Currency)
    Unicode block: 20A0..20CF; Currency Symbols
    Bidi: ET (European Number Terminator)
   
    root@kali:/usr/local/src/py/project_dirs# unicode -d 8364
    U+20AC EURO SIGN
    UTF-8: e2 82 ac UTF-16BE: 20ac Decimal: € Octal: \020254
    €
    Category: Sc (Symbol, Currency)
    Unicode block: 20A0..20CF; Currency Symbols
    Bidi: ET (European Number Terminator)
   

4. 参考网站: https://www.w3schools.com/charsets/ref_html_utf8.asp
   http://whatisunicode.com