linux timezone文件
现linux上运行大型APP程序，该app中有自带的表征timezone的.xml文件，现在想把APP设置的timezone设定传递给linux的timezone，让linux的timezone跟随我app的设置变化，该如何操作呢，提个思路也好 man timezoneFILES
/etc/localtime
The system timezone file.
/usr/share/zoneinfo/
The system timezone database directory.
/usr/share/zoneinfo/posixrules
When a TZ string includes a dst timezone without anything following it, then this file is used for the start/end rules.Itisinthetzfile(5)
format.By default, the zoneinfo Makefile hard links it to the America/New_York tzfile.
Above are the current standard file locations, but they are configurable when glibc is compiled.
系统启动后，解析你App的配置文件，取出 TZ 类型: 然后找 /usr/share/zoneinfo 下对应的文件替换 /etc/localtime
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