ubuntu centos yum update 或者 apt update 错误： NO_PUBKEY 解决方案

public key is not available: NO_PUBKEY F57D4F59BD3DF454

apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F57D4F59BD3DF454

# ubuntu 解决方案： 将报错的这个key，添加这个 key

yum adv --recv-keys --keyserver keyserver.ubuntu.com F57D4F59BD3DF454

# centos 解决方案： 添加这个 key

配置 apt 仓库源：http://eisc.cn/index.php?c=read&id=1070&page=1&cache=refresh

清华apt 源选择版本：https://mirrors.tuna.tsinghua.edu.cn/help/ubuntu/

vi /etc/apt/sources.list

# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse

# 预发布软件源，不建议启用

# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse

# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse

apt update       # 更新apt 源