centos大版本升级6到7

2019-11-01 Linux YY.K Permalink

从6升级到7，建议按步骤走一遍弄个机器测试升级，玩坏了自己买单。

#!/bin/bash

cat>/root/fix.sh<<EOF
rm -f /lib64/libpcre.so.0 /usr/lib64/libpcre.so.0 /usr/lib64/libsasl2.so.2 /lib64/libsasl2.so.2
ln -s /usr/lib64/libpcre.so.1.2.0 /lib64/libpcre.so.0
ln -s /usr/lib64/libpcre.so.1.2.0 /usr/lib64/libpcre.so.0
ln -s /usr/lib64/libsasl2.so.3.0.0  /usr/lib64/libsasl2.so.2
ln -s /usr/lib64/libsasl2.so.3.0.0  /lib64/libsasl2.so.2
yum -y downgrade  grep
mv  root/fix.sh root/fix.txt
EOF
chmod 755 /root/fix.sh
echo "/root/fix.sh">> /etc/rc.local

cat>/etc/yum.repos.d/upgradetool.repo<<EOF
[upg]
name=CentOS-$releasever - Upgrade Tool
baseurl=http://buildlogs.centos.org/centos/6/upg/x86_64/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
EOF
    
yum -y erase openscap
yum -y install redhat-upgrade-tool preupgrade-assistant-contents --disablerepo=base
preupg -s CentOS6_7 <<EOF
y
EOF
rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7
centos-upgrade-tool-cli --network 7 --instrepo=http://vault.centos.org/centos/7.2.1511/os/x86_64/ <<EOF
y
EOF
reboot
Centos, 升级