CentOS 升級至指定版本

CentOS系統下用yum upgrade命令只能升級到最新版本，CentOS倉庫並不維護歷史版本，所以只能使用 vault.centos.org 歷史版本快照進行更新。
本文以將7.0.1406升級到7.2.1511為例。

1、備份舊的版本倉庫文件：

mkdir -p /etc/yum.repos.d/backup
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backup/

2、創建要升級到版本(7.2.1511)的Vault版本倉庫文件：

vim /etc/yum.repos.d/CentOS-Vault.repo

# CentOS Vault contains rpms from older releases in the CentOS-7
# tree.
# C7.2.1511
[C7.2.1511-base]
name=CentOS-7.2.1511 - Base
baseurl=http://vault.centos.org/7.2.1511/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

[C7.2.1511-updates]
name=CentOS-7.2.1511 - Updates
baseurl=http://vault.centos.org/7.2.1511/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

[C7.2.1511-extras]
name=CentOS-7.2.1511 - Extras
baseurl=http://vault.centos.org/7.2.1511/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

[C7.2.1511-centosplus]
name=CentOS-7.2.1511 - CentOSPlus
baseurl=http://vault.centos.org/7.2.1511/centosplus/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

[C7.2.1511-fasttrack]
name=CentOS-7.2.1511 - Fasttrack
baseurl=http://vault.centos.org/7.2.1511/fasttrack/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1

3、查看現在可用倉庫列表：

# yum repolist

4、查看現在可用倉庫版本：

# yum list updates | grep "centos-release"

5、清空本地緩存：

# yum clean all
# rm -rf /var/cache/yum

6、版本升級：

# yum -y update

7、備份過渡的Vault倉庫文件，啟用新版的倉庫文件：

# mv /etc/yum.repos.d/CentOS-Vault.repo /etc/yum.repos.d/backup/
# mv /etc/yum.repos.d/CentOS-Vault.repo.rpmnew /etc/yum.repos.d/CentOS-Vault.repo

8、清空本地緩存，更新版本庫文件：

# yum clean all
# yum makecache

 

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