【statement】
- 1. Refer to the dark horse tutorial https://www.bilibili.com/video/BV1UQ4y1P7Xr?from=search&seid=419705943532181401
- 2. Reference article: Centos8 install mysql8.0
table of Contents
Download the MySQL installation package from the official website
Uninstall mysql pre-installed in centos
Install the RPM package (note the installation order)
Check if the installation is successful
/var/lib/mysql directory permission authorization
View the initial randomly generated root password
Stop, restart and view the mysql service
Download the MySQL installation package from the official website
- Website: https://dev.mysql.com/downloads/
- Select version
- Download the corresponding installation package
- Transfer the downloaded file to /usr/local/Mysql8
Install MySQL
Uninstall mysql pre-installed in centos
rpm -qa | grep -i mysql
- If installed, uninstall
rpm -e 安装的mysql --nodeps
- Can refer to : https://blog.csdn.net/typa01_kk/article/details/49057073
Install dependencies
yum -y install libaio.so.1 libgcc_s.so.1 libstdc++.so.6 libncurses.so.5 --setopt=protected_multilib=false
Install the RPM package (note the installation order)
rpm -ivh 安装包
Check if the installation is successful
ps -ef | grep mysql
mysqladmin --version
Initialize mysql
- Create data file directory and mysql system database to generate random root password
mysqld --initialize
/var/lib/mysql directory permission authorization
chown -R mysql:mysql /var/lib/mysql/
Start mysql service
- start up
systemctl start mysqld
- View mysql service
ps -ef | grep mysql
View the initial randomly generated root password
cat /var/log/mysqld.log | grep password
Security Settings
mysql_secure_installation
- 1. Whether to set the authentication password component, I did not check what it is, because it is not used, I directly select No;
- 2. Whether to change the root password, input y will reset the new password, we have changed the password, select No;
- 3. Whether to delete anonymous users, the suggestion is to delete, choose y;
- 4. Whether to prohibit root remote login, it is recommended to prohibit it, choose y; (wait, why prohibit it, don't we want to log in remotely? Yes, the configuration of Navicat login will be introduced later, temporarily set it to y for security considerations )
- 5. Whether to delete the test database, select y;
- 6. Whether to reload the permission table, select y.
- [Note: Reference Centos8 installation mysql8.0 (Author: feng_shede )
After the security configuration, log in to the database and type the command:
mysql -uroot -p
Set the root user's localhost to% (used to connect to Navicat)
use mysql select user,host from user; update user set host = '%' where user = 'root'; flush privileges; ALTER USER 'root'@'%' IDENTIFIED BY '123456' PASSWORD EXPIRE NEVER; -- 更改加密方式 ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456'; -- 更新用户密码 flush privileges; -- 刷新权限
Stop, restart and view the mysql service
systemctl stop mysqld -- 停止服务 systemctl restart mysqld -- 重启服务 systemctl status mysqld -- 查看服务
mysql related installation directory files
/usr/share/mysql //配置文件目录 /var/lib/mysql //数据库文件存放目录 /etc/my.cnf //mysql的启动配置文件 mysqld //是后台守护进程，即mysql daemon mysql //是客户端命令行
Need to close the firewall or open port 3306
service iptables stop #暂时关闭 chkconfig iptables off #设置成开启不自启（这个命令没有测试，可以自己试一下，centos8应该是不支持chkconfig 命令了） /sbin/iptables -I INPUT -p tcp --dport 3306 -j ACCEPT #开启3306端口 /etc/rc.d/init.d/iptables save #保存配置 /etc/rc.d/init.d/iptables restart #重启服务
