mysql是常用关系型数据库,之前在centos上安装5.6都没有问题,8居然有授权问题。
Centos mysql8安装
移除 mariadb
rpm ‐qa | grep mariadb
yum remove mariadb*
安装 mySql
wget https://repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm
yum localinstall mysql80-community-release-el7-3.noarch.rpm
yum -y install mysql-community-server #社区版
or
yum -y install mysql-server
启动 mysql 服务
systemctl enable mysqld
systemctl start mysqld
重置密码
# 查找 root 初始密码
cat /var/log/mysqld.log
# 设置新的 root 密码
mysql -u root -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'P@ssw0rd';
开启远程访问
常用开启命令如下
grant all privileges on *.* to 'root'@'%' identified by '你的密码' with grant option
这种方法并不适用于Mysql 8.0以后的版本
image.png
需要用如下命令开启远程服务
CREATE USER 'root'@'%' IDENTIFIED BY '你的密码';
GRANT ALL ON *.* TO 'root'@'%';
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '你的密码';
FLUSH PRIVILEGES;
Centos mysql5.7安装
安装 mysql-server
# 下载并安装 mysql yum
wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql57-community-release-el7-10.noarch.rpm
# 安装 mysql-server
yum -y install mysql-community-server
mysql 初始化安装的一些配置
# 启动 mysql-serer
systemctl start mysqld.service
# 查看是否启动成功,即是否存在 3306 端口
netstat -tnlp | grep 3306
# 查询 root 密码,登录到 mysql
grep "password" /var/log/mysqld.log
mysql -uroot -p
# 首次操作要求重置密码,必须大小写特殊字符组成
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';
# 授权远程访问 % 表示所有主机都可以访问
mysql> grant all privileges on *.* to 'root'@'%' identified by 'password' with grant option;
# 刷新权限信息
mysql> flush privileges;
修改字符集
vi /etc/my.cnf
[client]
default-character-set=utf8
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
# 重启 mysql
systemctl restart mysqld.service
# 查看是否配置成功
mysql> status;
Server characterset: utf8
Db characterset: utf8
Client characterset: utf8
Conn. characterset: utf8
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