记录一下，便于后面再次安装。

更改yum为阿里云源

官方页面：https://developer.aliyun.com/mirror/centos
配置方法

1. 备份

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2. 下载新的 CentOS-Base.repo 到 /etc/yum.repos.d/

CentOS 6

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-6.repo

CentOS 7

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

CentOS 8

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo

3. 运行 yum makecache 生成缓存

4. 其他

非阿里云ECS用户会出现 Couldn't resolve host 'mirrors.cloud.aliyuncs.com' 信息，不影响使用。用户也可自行修改相关配置: eg:

sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

安装wget

yum install wget -y

安装web环境

https://oneinstack.com/auto/

安装jdk1.8

1.下载

https://www.oracle.com/java/technologies/downloads/#java8

2.解压

tar -zxvf jdk-8u301-linux-x64.tar.gz 

3.移动

mv jdk1.8.0_301/ /usr/local/

4.设置环境变量

vim /etc/profile

改为你的真实路径

#java environment
export JAVA_HOME=/usr/local/jdk1.8.0_301
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=$PATH:${JAVA_HOME}/bin

让配置生效

source /etc/profile

扫码在手机查看