[TOC] ### 下载对应的证书 执行脚本: ``` `curl -sL "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x5523BAEEB01FA116" | sudo apt-key add` ``` `Replace` 0x5523BAEEB01FA116 with 0x 完成后，执行`sudo apt udpate`，检验是否报错