==========硬件准备===========
1核2G
不少于 10G 磁盘空余空间
安装centos7.9以下版本
配置内网互通和IP地址
================系统安装好 docker=======
yum -y install yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum -y install docker-ce
systemctl start docker
systemctl enable docker
docker version
（客户端到此结束）
============sp安装=======================
docker run -d \
--privileged \
--restart=unless-stopped \
--name=kuboard-spray \
-p 80:80/tcp \
-v /var/run/docker.sock:/var/run/docker.sock \
-v ~/kuboard-spray-data:/data \
eipwork/kuboard-spray:latest-amd64
========升级到centos7.9==CentOS升级到指定小版本====
#备份原来源
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
cat /etc/redhat-release
yum clean all
yum update
init 6
==========升级======
yum clean all #清除 Yum 在本机的缓存
yum repolist #查看仓库信息
yum update #更新，系统会自动更新你源配置的版本
==================
参考
https://blog.csdn.net/SmithYan/article/details/104779272
https://www.csdn.net/tags/MtTaMg0sMzc1NjktYmxvZwO0O0OO0O0O.html
https://blog.csdn.net/qq_34208660/article/details/120216328
=====================
一，修改yum源
[root@bogon yum.repos.d]# cat CentOS-Base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever - Base
#mirrorlist=
baseurl=
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=
baseurl=
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
mirrorlist=
#baseurl=
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
mirrorlist=
#baseurl=
gpgcheck=1
enabled=0
gpgkey=
二。执行命令将7.5更新为7.6，完成后重启即可
yum update -y
======================
操作记录如下：
[root@jwbdb alpha]# chkconfig –list yum-updatesd
yum-updatesd 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭
[root@jwbdb alpha]# service yum-updatesd stop
停止 yum-updatesd： [确定]
[root@jwbdb alpha]# service yum-updatesd status
yum-updatesd 已停
[root@jwbdb alpha]# chkconfig –level 35 yum-updatesd off
[root@jwbdb alpha]# chkconfig –list yum-updatesd
yum-updatesd 0:关闭 1:关闭 2:启用 3:关闭 4:启用 5:关闭 6:关闭
-----------------------------------
http://olcentchan.chinacloudapp.cn/centos/7.8.2003/
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
========================
# vim /etc/yum.repos.d/CentOS-Base.repo
[base]
name=CentOS-7.6.1810 - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://olcentchan.chinacloudapp.cn/centos/7.6.1810/os/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/os/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/os/$basearch/
gpgcheck=1
gpgkey=http://olcentchan.chinacloudapp.cn/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-7.6.1810 - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=http://olcentchan.chinacloudapp.cn/centos/7.6.1810/updates/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/updates/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/updates/$basearch/
gpgcheck=1
gpgkey=http://olcentchan.chinacloudapp.cn/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-7.6.1810 - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=http://olcentchan.chinacloudapp.cn/centos/7.6.1810/extras/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/extras/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/extras/$basearch/
gpgcheck=1
gpgkey=http://olcentchan.chinacloudapp.cn/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-7.6.1810 - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://olcentchan.chinacloudapp.cn/centos/7.6.1810/centosplus/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/centosplus/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://olcentchan.chinacloudapp.cn/centos/RPM-GPG-KEY-CentOS-7
#contrib - packages by Centos Users
[contrib]
name=CentOS-7.6.1810 - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://olcentchan.chinacloudapp.cn/centos/7.6.1810/contrib/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/contrib/$basearch/
http://olcentchan.chinacloudapp.cn/centos/7.6.1810/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://olcentchan.chinacloudapp.cn/centos/RPM-GPG-KEY-CentOS-7
===更换yum==========================
# 对于 CentOS 7
sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \
-e 's|^#baseurl=http://mirror.centos.org|baseurl=https://mirrors.tuna.tsinghua.edu.cn|g' \
-i.bak \
/etc/yum.repos.d/CentOS-*.repo
# 对于 CentOS 8
sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \
-e 's|^#baseurl=http://mirror.centos.org/$contentdir|baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos|g' \
-i.bak \
/etc/yum.repos.d/CentOS-*.repo
=============================================
更换yum源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
更换epel源
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
————————————————
#更新缓存
sudo yum makecache
yum clean all
#重启
init 6
更新源
#yum update
#升级
yum upgrade
===========
# 此条不用 yum --disablerepo='*' --enablerepo='C7.5*' upgrade
#检查内核版本
yum info kernel -q
#查看现在可用仓库列表
yum repolist
# 查看现在可用仓库版本
yum list updates | grep "centos-release"
#清空本地缓存
yum clean all
rm -rf /var/cache/yum
# 版本升级
yum -y update
# 查看更新后的版本
cat /etc/redhat-release
备份过渡的repo仓库文件，启用新版的仓库文件
# 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
清空本地缓存，更新版本库文件
# yum clean all
# yum makecache
