在给ubuntu软件源中添加新的item后,可能在再行软件库更新操作时,会出现缺少public key问题,可通过如下解决:
Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2EA8F35793D8809A
然后执行
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 2EA8F35793D8809A