一、我來說LuCI: LuCI官方----2.UCI
The abbreviation UCI stands for Unified Configuration Interface and is intended to centralize the configuration of OpenWrt.
Configuration should be easy and straightforward, making life easier! UCI is all about that. It is the successor to the NVRAM-based configuration found in the White Russian series of OpenWrt. UCI can be seen as OpenWrt's main configuration user interface for the most important system settings. Typically, these are settings that are crucial for the functioning of the device, such as are typically found in the web interface of routers and embedded devices; that is, functionality that is integrated in the system builds. Examples are the main network interface configuration, wireless settings, logging functionality and remote access configuration.
In addition, selected third party programs have been made compatible with the UCI system, so these can be managed more easily as well. Many programs have their own configuration files lying around somewhere, like/etc/network/interfaces, /etc/exports, /etc/dnsmasq.conf or /etc/samba/smb.conf and
they often use different syntaxes. With OpenWrt, you don't have to bother with any of them and need to change only the UCI configuration file(s). Of course, most of the software that you would like to install will not have been prepared for UCI configuration,
which is a good thing, because oftentimes you will want the full power of an application's own configuration interface, as it was intended by the developers. Therefore, only a few selected programs which benefit from availability of a centralised configuration
have been made UCI-compatible by the OpenWrt package maintainers (see the UCI configuration file list below).
Most applications (save some that are made in-house) are made UCI-compatible by the package maintainer by simply writing the original configuration file (which is read by the program) according to the chosen settings in the corresponding UCI file. This is done
upon running the initialization scripts in /etc/init.d/
/etc/samba/smb.conf is overwritten with UCI settings from the UCI configuration file /etc/config/samba when
running/etc/init.d/samba start. In addition, the application's configuration file is often stored in RAM instead of in flash, because it does not need to be stored in non-volatile memory
and it is rewritten after every change, based on the UCI file. There are ways to disable UCI in case you want to adjust settings in the original configuration file not available through UCI. 
add
the recommended way please, or link to it.
For those non-UCI compatible programs, there is a convenient list of some non-UCI configuration files you may want to tend to. Note that, for most third party programs, you should consult the program's own documentation.