openwrt原始編譯目錄： /etc/config -> mtk7621-buildroot/staging_dir/target-mipsel_uClibc-0.9.30.1/root-mtk762x/etc/config$
![openwrt 之設定uboot中tftp燒寫證書變量[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)