/bin/ota
/usr/lib/lua/luci/view/admin_system/ota.htm
/usr/lib/lua/luci/view/admin_system/ota_flashing.htm
/usr/lib/lua/luci/model/cbi/admin_system/ota_config.lua
/usr/lib/lua/luci/controller/admin/ota.lua
/etc/config/ota