添加升级工具的源 Cnetos 6.5 升级7.0

1、添加升级工具的源

[root@localhost ~]# more /etc/yum.repos.d/upgradetool.repo

[upg]

name=CentOS-$releasever - Upgrade Tool

baseurl=http://dev.centos.org/centos/6/upg/x86_64/

gpgcheck=1

enabled=1

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

2、安装升级工具

    yum install redhat-upgrade-tool preupgrade-assistant-contents

3、导入GPG-KEY

    sudo rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7

4、进行系统升级评估，看升级有无风险

查看升级可用的目录

preupg -l

如果结果为CentOS6_7 ，继续执行：

preupg -s CentOS6_7

5、升级工具（force强制升级）

    sudo centos-upgrade-tool-cli --network 7 --force --instrepo=http://mirror.centos.org/centos/7/os/x86_64/

    

     如果出现下面error 再执行下sudo centos-upgrade-tool-cli --network 7 --force --instrepo=http://mirror.centos.org/centos/7/os/x86_64/

     Downloading failed: Errors were encountered while downloading packages.

    

     全部完成后会提示重启

     testing upgrade transaction

rpm transaction 100% [===============================================================================================]

rpm install 100% [===================================================================================================]

setting up system for upgrade

Finished. Reboot to start upgrade.

    

6、软件包下载完成后，按照提示重启机器，等待升级完成。

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