yum安装mysql5.7和8.0版本

yum安装mysql 5.7

• 下载源

wget -i -c https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

yum -y install mysql80-community-release-el7-3.noarch.rpm

yum-config-manager --disable mysql80-community

yum-config-manager --enable mysql57-community

• 安装mysql

yum install -y mysql-server 

yum install -y mysql-devel

• /etc/my.cnf 文件中加入默认字符集

# [mysqld]
# datadir=/var/lib/mysql
# socket=/var/lib/mysql/mysql.sock
character-set-server=utf8
collation-server=utf8_general_ci

• 启动服务

# 启动
systemctl start mysqld

# 查看状态
systemctl status mysqld

# 开机自启动
systemctl enable mysqld

# 查看监听端口，默认 3306
ss -natl |grep 3306

• 初始密码修改

cat /var/log/mysqld.log | grep password 

# 关闭安全验证策略
SET GLOBAL validate_password_policy=0;
# 密码最小长度
SET GLOBAL validate_password_length=4;

ALTER USER 'root'@'localhost' IDENTIFIED BY '666666';

• 远程登录

# 放开3306端口
firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload


# 远程登录还需要授权远程登录，mysql默认不允许远程登录
grant all PRIVILEGES on *.* to 'root'@'%' identified by '666666' WITH GRANT OPTION;

# 刷新，使修改生效
flush privileges;

# 重启数据库
systemctl restart mysql

yum安装mysql 8.0

卸载mysql的命令

yum remove mysql

删除mysql的配置文件

find / -name mysql
rm -rf XXX/XXX

rpm -qa | grep mysql
rpm -e --nodeps xxx

安装源

wget -i -c https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

yum -y install mysql80-community-release-el7-3.noarch.rpm


# 查看mysql yum仓库中mysql版本
yum repolist all | grep mysql

安装并开启服务

yum install mysql-community-server

systemctl start mysqld.service

systemctl enable mysqld.service

初始密码修改

cat /var/log/mysqld.log | grep password

mysql -u root -p

# 验证策略取消，密码最小长度（4）
set global validate_password.policy=0;
set global validate_password.length=4;

# 修改密码
ALTER USER 'root'@'localhost' IDENTIFIED BY 'root';

远程设置

#远程设置
use mysql;
update user set host='%' where user='root';
#授权用户名的权限，赋予任何主机访问数据的权限
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%'WITH GRANT OPTION;
FLUSH PRIVILEGES;

开放3306端口

# 查看已经开放的端口
firewall-cmd --list-ports  

# 开启端口
firewall-cmd --zone=public --add-port=3306/tcp --permanent  

# 重启firewall  
firewall-cmd --reload