CentOS无损升级AlmaLinux OS 1. 更新CentOS软件源（国内适用）{tabs}{tabs-pane label="CentOS 6"}wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-6.repo{/tabs-pane}{tabs-pane label="CentOS 7"}wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo{/tabs-pane}{/tabs-pane}{tabs-pane label="CentOS 8"}wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo{/tabs-pane}{/tabs}2. 生成缓存yum makecache3. 升级至最新版本sudo dnf update -y sudo reboot4. 转换AlmaLinux OS4.1 准备脚本{tabs}{tabs-pane label="国外"}curl -O https://raw.githubusercontent.com/AlmaLinux/almalinux-deploy/master/almalinux-deploy.sh{/tabs-pane}{tabs-pane label="国内"}curl -O https://cdn.jsdelivr.net/gh/AlmaLinux/almalinux-deploy@master/almalinux-deploy.sh{/tabs-pane}{/tabs}注意: 需要赋予almalinux-deploy.sh文件完全的可执行权限，否则很可能升级不成功！4.2 转换sudo bash almalinux-deploy.sh耐心等候，几分钟至十几分钟（根据自身服务器性能而定）后重启sudo reboot4.3 升级AlmaLinux OSsudo yum update -y

linux环境yum异常：BDB1507 Thread died in Berkeley DB library linux环境yum异常：BDB1507 Thread died in Berkeley DB library