centos小版本更新

Posted 2021-02-19 xiaochina

问题描述

　　centos6.x/centos7.x各个主线内小版本的升级总结

题记：centos6-->7升级风险比较大，小版本升级风险很小！

实验环境

　　centos6.3-->centos6-10   //可以升级到特定的小版本，只需要配置特定的yum源版本

　　联网在线更新小版本/离线更新(内网使用)  //下载特定centos dvd版本制作本地yum源

配置yum源

[root@stack yum.repos.d]# uname -a
Linux stack 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@stack yum.repos.d]#
[root@stack yum.repos.d]# cat /etc/*release
CentOS release 6.3 (Final)
CentOS release 6.3 (Final)
CentOS release 6.3 (Final)

当前存在的备份下

mkdir /opt/repo_old

mv /etc/yum.repos.d/*  /opt/repo_old

https://mirrors.cloud.tencent.com/help/centos.html   //腾讯mirror centos

centos6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos6_base.repo      //目前最新的小版本centos6-10

yum clean all && yum makecache

yum --help

　　update Update a package or packages on your system   //更新小版本
　　upgrade Update packages taking obsoletes into account  //升级软件包

升级重启

yum install -y update

reboot

[root@stack ~]# cat /etc/*release
CentOS release 6.10 (Final)
CentOS release 6.10 (Final)
CentOS release 6.10 (Final)
[root@stack ~]# uname -a
Linux stack 2.6.32-754.29.1.el6.x86_64 #1 SMP Mon Apr 27 15:30:33 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

注意：centos系列小版本的更新，默认内核不会有太大的更新2.6.32

reference

https://docs.azure.cn/zh-cn/articles/azure-operations-guide/virtual-machines/linux/aog-virtual-machines-linux-centos-howto-upgrade-to-specified-minor-version

https://www.jianshu.com/p/f4c4086c9816