Mysql出现问题：error while loading shared libraries: libaio解决方案
问题
初始化数据库时
mysqld –initialize –user mysql
报错：
mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
执行这行命令报错了，原因是：新的服务器环境，上面很多依赖都没有，所以安装软件的时候遇到一大堆小问题，解决它很简单，它缺少啥就安装啥。
解决方案
yum install -y libaio.so.1
又报错了：
Errors during downloading metadata for repository ‘epel’:
Status code: 404 for http://archives.fedoraproject.org/pub/archive/epel/8/Everything/x86_64/repodata/repomd.xml (IP: **)
Error: Failed to download metadata for repo ‘epel’: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
Status code: 404 for http://archives.fedoraproject.org/pub/archive/epel/8/Everything/x86_64/repodata/repomd.xml (IP: **)
Error: Failed to download metadata for repo ‘epel’: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
原因是：第三方的镜像站中均已移除CentOS 8的源，Centos 8版本已停止更新相应依赖导致的，下载新的yum源即可搞定。
解决方案：备份之前的repo文件，命令：
mv /etc/yum.repos.d /etc/yum.repos.d.bak
创建源文件目录，命令：
mkdir -p /etc/yum.repos.d
下载新的yum源
curl https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo > /etc/yum.repos.d/Centos-vault-8.5.2111.repo
curl https://mirrors.aliyun.com/repo/epel-archive-8.repo > /etc/yum.repos.d/epel-archive-8.repo
curl https://mirrors.aliyun.com/repo/epel-archive-8.repo > /etc/yum.repos.d/epel-archive-8.repo
如图所示操作：
再下载依赖：
yum install -y libaio.so.1
再安装
yum install -y libaio
提示成功后，初始化数据库：
mysqld –initialize –user mysql
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