是 internationalization 的缩写形式，意即在 i 和 n之间有 18 个字母，本意是指软件的“国际化”.
I18N支持多种语言，但是同一时间只能是英文和一种选定的语言，例如英文+中文、英文+德文、英文+韩文等等；
原来的:
LANG="zh_CN.UTF-8"
SUPPORTED="zh_CN.UTF-8:zh_CN:zh"
SYSFONT="latarcyrheb-sun16"

/etc/sysconfig/i18nControls the system fontsettings. The language variables are used in/etc/profile.d/lang.sh. An example i18n file: LANG="en_US"
LC_ALL="en_US"
LINGUAS="en_US"
Options:
LANG= set locale for all categories, can be any two letter ISOlanguage code.
LC_CTYPE= localedata configuration for classification andconversion of characters.
LC_COLLATE= localedata configuration for collation (sort order) ofstrings.
LC_MESSAGES= localedata configuration for translation of yes and nomessages.
LC_NUMERIC= localedata configuration for non-monetary numericdata.
LC_MONETARY= localedata configuration for monetary data.
LC_TIME= localedata configuration for date and time.
LC_ALL= localedata configuration overriding all of the above.
LANGUAGE= can be a : separated list of ISO language codes.
LINGUAS= can be a ‘ ‘ separated list of ISO language codes.
SYSFONT= any font that is legal when used as /usr/bin/consolechars-f $SYSFONT ... (See console-tools package for consolecharscommand)
UNIMAP= any SFM (screen font map, formerly called Unicode mappingtable - see consolechars(8))
/usr/bin/consolechars -f $SYSFONT --sfm $UNIMAP
SYSFONTACM= any ACM (application charset map - seeconsolechars(8))
/usr/bin/consolechars -f $SYSFONT --acm $SYSFONTACM