ubuntu file encoding

ubuntu file encoding
sudo apt-get install enca
man enca

enca gzwfcx.js
enca --list charsets
enca --list surfaces
enca --list languages

enca gzwfcx.js (will convert file FILE to your locale native encoding. )
Universal transformation format 8 bits; UTF-8

enca gzwfcx.js
Universal transformation format 8 bits; UTF-8
enca -x GB2312 gzwfcx.js
enca gzwfcx.js
Simplified Chinese National Standard; GB2312

enca --list languages
russian: KOI8-R CP1251 ISO-8859-5 IBM866 maccyr
chinese: GBK BIG5 HZ

建议以后编程序的时候，遇到默认编码为GB2312的大可以直接使用GBK进行解码为unicode字符串。
require 'iconv'
Iconv.iconv('utf-8', 'GBK', text)
Note:编码转换后关闭文件再重新打开