一、安装前

1.检查是否已经安装mysql

rpm -qa | grep mysql 

2.将查询出的包卸载掉

rpm -e --nodeps  文件名 

3.将/usr/lib64/libLLVM-7.so删除

 rm -rf /usr/lib64/libLLVM-7.so 

4.检查删除结果

 rpm -qa | grep mysql 

5.搜索残余文件

whereis mysql 

6.删除残余文件

 rm -rf /usr/bin/mysql /usr/share/man/man1/mysql.1.gz 

7.验证删除

whereis mysql 

8.检查MySQL用户组以及用户是否存在，若没有则创建

cat /etc/group | grep mysql  cat /etc/passwd |grep mysql  groupadd mysql  useradd -r -g mysql mysql 

9.上传安装包
将mysql-8.0.33-linux-glibc2.17-x86_64-minimal.tar安装包上传到银河麒麟系统虚拟机中

二、安装

10.开始解压，在目录下/usr/local

tar -vxf mysql-8.0.33-linux-glibc2.17-x86_64-minimal.tar 

11.重命名mysql文件夹

mv mysql-8.0.33-linux-glibc2.17-x86_64-minimal mysql 

12.在目录下/usr/local/mysql/创建data目录

mkdir /usr/local/mysql/data 

13.更改MySQL目录下所有的目录文件夹所属组和用户以及权限

chown -R mysql:mysql /usr/local/mysql  chmod -R 755 /usr/local/mysql 

14.在/etc/目录下，创建一个my.cnf文件

[mysqld] datadir=/usr/local/mysql/data basedir=/usr/local/mysql socket=/usr/local/mysql/data/mysql.sock user=mysql port=3306 character-set-server=utf8 symbolic-links=0 sql-mode=STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid [client] port=3306 socket=/usr/local/mysql/data/mysql.sock 

15.编译安装并初始化MySQL数据库，并记录初始化后末尾输出的初始化密码

cd /usr/local/mysql/bin 

./mysqld  --user=mysql  --datadir=/usr/local/mysql/data --basedir=/usr/local/mysql  --initialize 

16.添加开机自启并开启服务

cp -rf /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld  chmod +x /etc/init.d/mysqld  /usr/lib/systemd/systemd-sysv-install enable mysqld 

17.添加环境变量 vim /etc/profile

export MYSQL_HOME=/usr/local/mysql  export PATH=$PATH:$MYSQL_HOME/bin 

使环境变量生效

source /etc/profile 

18.开启MySQL服务

systemctl start mysqld 

19.查询服务状态

systemctl status mysqld 

三、安装后

20.使用默认密码登录数据库

mysql -u root -p 

21.修改密码

alter user 'root'@'localhost' identified by 'root'; 

刷新权限

flush privileges; 

22.允许远程登录

update user set host ='%' where user ='root' and host = 'localhost'; 

刷新权限

flush privileges; 

23.关闭防火墙
防火墙状态：

systemctl status firewalld.service 

关闭firewall：

systemctl stop firewalld.service 

禁止firewall开机启动:

systemctl disable firewalld.service 

查看已经开放的端口：

firewall-cmd --list-ports 

开启端口：

firewall-cmd --zone=public --add-port=80/tcp --permanent