1.查看是否已经安装了mysql
rpm -qa|grep mysql #无输出说明没有安装
2.下载rpm
2.1 手动下载
打开网址：MySQL Yum存储库
选择linux7，点击下载
2.2 wget下载
wget https://dev.mysql.com/get/mysql80-community-release-el7-10.noarch.rpm
3.安装mysql源
rpm -ivh mysql80-community-release-el7-10.noarch.rpm
4.安装mysql
sudo yum install mysql-community-server
5.启动停止重启mysql
systemctl start mysqld.service
systemctl stop mysqld.service
systemctl restart mysqld.service
设置mysql服务开机自启动
systemctl enable mysqld.service
停止mysql服务开机自启动
systemctl disable mysqld.service
6.mysql配置
6.1 查找初始密码
grep 'temporary password' /var/log/mysqld.log
6.2 登录MySQL
mysql -u root -p'初始密码'
6.3 修改root密码
alter user 'root'@'localhost' identified by 'Su#2023Gjj';
6.4 配置外部访问
use mysql;
update user set host = '%' where user = 'root';
flush privileges;
6.5 大小写问题
vi /etc/my.cnf
lower_case_table_names=1
7.卸载mysql
7.1 yum list命令检查是否安装了Mysql
yum list | grep mysql
7.2 卸载Mysql
yum remove mysql
7.3 删除依赖
查看命令
rpm -qa | grep -i mysql
删除依赖：例
yum remove mysql80-community-release-el7-10.noarch
7.4 删除mysql文件目录
使用 rm -rf 文件或目录 依次删除mysql文件目录,可使用：find / -name mysql 查看相关的文件目录
例：
rm -rf /usr/share/mysql
rm -rf /var/lib/mysql
7.5 更新Yum缓存
yum clean all