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<>问题描述
在Ubuntu 22.04 中使用apt-get update 命令更新软件列表时，出现次错误
<>解决方法
apt-key命令用于管理Debian
Linux系统中的软件包密钥。每个发布的Debian软件包都是通过密钥认证的，apt-key命令用来管理Debian软件包密钥，常用命令如下。
列出已保存在系统中key：
[root@wild_wolf ~]# apt-key list
把下载的key添加到本地trusted数据库中：
[root@wild_wolf ~]# apt-key add keyname
从本地trusted数据库删除key：
[root@wild_wolf ~]# apt-key del keyname
更新本地trusted数据库，删除过期没用的key：
[root@wild_wolf ~]# apt-key update
使用如下命令向pgp传递高级特性，后面跟的是NO PUBKEY后面那串代码，比如：
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 76F1A20FF238972E
<>解决结果
然后使用 apt-get update 即可。
