centOS 7.9 安装JDK MYSQL

jdk:

Java Archive Downloads - Java SE 17.0.12 and earlier

CentOS安装JDK17教程（完整版） - 秦胜飞 - 博客园

sudo yum update
wget https://download.oracle.com/java/17/archive/jdk-17.0.3.1_linux-x64_bin.rpm
yum install ./jdk-17.0.3.1_linux-x64_bin.rpm
java -version

mysql:

https://dev.mysql.com/downloads/repo/yum/

curl -sSLO https://dev.mysql.com/get/mysql84-community-release-el7-1.noarch.rpm
md5sum mysql84-community-release-el7-1.noarch.rpm
sudo rpm -ivh mysql57-community-release-el7-9.noarch.rpm
sudo yum install mysql-server
sudo systemctl status mysqld
sudo systemctl start mysqld
sudo systemctl status mysqld
sudo grep 'temporary password' /var/log/mysqld.log
vim /etc/my.cnf
[mysqld]
validate_password.policy = LOW  # 可以设置为LOW, MEDIUM, STRONG, 或STRONG以外的自定义策略
validate_password.length = 4    # 设置最小密码长度

sudo systemctl restart mysqld
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';
mysql -uroot -p
use mysql
select Host, user from user;
update user set host='%' where user='root';
flush privileges;