因为军佬放弃制作Centos7的网络重装包，又Centos7的安装引导和6有较大区别所以，选择曲线救国（技术不行，只能这样乱搞）前文：Centos6.9一键重装包https://ppx.ink/netrebuild.ppx开始折腾首先，用军佬的脚本安装到Centos6.9（本懒人用的DO宝宝自带的centos6.9）ps：DO宝宝=digitalocean然后开始百度如何升级然后。。。没有然后了。。全部失败打开狗狗 搜索成功 得到了以下资料因为是Centos6.9 所以问题很多准备步骤首先，添加升级所需的源vi /etc/yum.repos.d/upgradetool.repo输入以下内容:wq保存[upg]name=CentOS-$releasever - Upgrade Toolbaseurl=http://dev.centos.org/centos/6/upg/x86_64/gpgcheck=1enabled=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6安装更新工具，卸载较新的预升级助手，安装较老的预升级助手yum install redhat-upgrade-tool preupgrade-assistant-contents -yyum erase openscap -yyum installhttp://dev.centos.org/centos/6/upg/x86_64/Packages/openscap-1.0.8-1.0.1.el6.centos.x86_64.rpm -yyum install redhat-upgrade-tool preupgrade-assistant-contents -y执行预更新检查preupg -s CentOS6_7 #输入y如果不更换预升级助手的版本，则会出现以下错误I/O warning : failed to load external entity "/usr/share/openscap/xsl/security-guide.xsl"compilation error: file /usr/share/preupgrade/xsl/preup.xsl line 40 element importxsl:import : unable to load /usr/share/openscap/xsl/security-guide.xslI/O warning : failed to load external entity "/usr/share/openscap/xsl/oval-report.xsl"compilation error: file /usr/share/preupgrade/xsl/preup.xsl line 41 element importxsl:import : unable to load /usr/share/openscap/xsl/oval-report.xslI/O warning : failed to load external entity "/usr/share/openscap/xsl/sce-report.xsl"compilation error: file /usr/share/preupgrade/xsl/preup.xsl line 42 element importxsl:import : unable to load /usr/share/openscap/xsl/sce-report.xslOpenSCAP Error:: Could not parse XSLT file '/usr/share/preupgrade/xsl/preup.xsl' [oscapxml.c:416]Unable to open file /root/preupgrade/result.htmlUsage: preupg [options]preupg: error: [Errno 2] No such file or directory: '/root/preupgrade/result.html' 开始升级导入Centos7的keyrpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7执行升级命令centos-upgrade-tool-cli --network 7 --instrepo=http://vault.centos.org/centos/7.2.1511/os/x86_64/reboot错误引导通过百度等方法得到的centos6.5升级方案中升级方式为centos-upgrade-tool-cli --network 7 --instrepo=http://mirror.centos.org/centos/7/os/x86_64/如果在Centos6.5以上执行将会提示以下错误Continue with the upgrade [Y/N]? ygetting boot images...Downloading failed: invalid data in .treeinfo: No option 'upgrade' insection: 'images-x86_64'根据反馈是.treeinfo 文件中的 ‘images-x86_64’ 部分没有 ‘upgrade’ 选项查看文件 http://mirror.centos.org/centos/7/os/x86_64/.treeinfo确实没有upgrade选项，还好狗狗到了上面提到的资料在Centos的旧版本备份中http://vault.centos.org/ 7.0.1406、7.1.1503、7.2.1511几个版本都有 ‘upgrade’ 选项这里我选择7.2来升级，所以上文包仓库地址为http://vault.centos.org/centos/7.2.1511/os/x86_64/ 而不是官方文档以及大部分资料中的http://mirror.centos.org/centos/7/os/x86_64/更新完成更新完成之后建议执行以下命令因为从Centos6.9更新到7.2必然出现一些问题例如ssh yum 无法正常使用所以，再重启之前，先做好准备vi start.sh #在root目录创建start.sh文件######输入以下内容#!/bin/bashln -s /usr/lib64/libsasl2.so.3.0.0 /usr/lib64/libsasl2.so.2ln -s /usr/lib64/libpcre.so.1.2.0 /usr/lib64/libpcre.so.0service sshd restartrm -rf /etc/rc.d/rc.local mv /etc/rc.d/rc.local.bak /etc/rc.d/rc.local #恢复原始文件rm -rf /root/start.sh #删除自身######:wq保存#执行以下命令chmod +x start.shchmod +x /etc/rc.d/rc.localcp /etc/rc.d/rc.local /etc/rc.d/rc.local.bak #创建备份echo 'bash /root/start.sh' >>/etc/rc.d/rc.local #添加脚本为开机自启动升级后续在重启之后，等待5-10分钟（也可能更长，视机器网络以及配置有关），连接SSH处理软件执行yum upgrade -y执行完成之后执行yum downgrade grep执行yum upgrade python执行上行代码时，会报错，什么python(abi)=2.6什么什么的利用rpm挨个删除后面的包再次执行#rpm -e xxxxxxyum upgrade python不报错升级成功即可运行yum updateps:升级有风险,谨慎升级 转载请注明：皮皮虾窝 » 记一次夏姬巴乱折腾的历程-Centos6.9升级至Centos7.2
转载于:https://www.cnblogs.com/yiyi17/p/9263562.html
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