Linux环境
1、mysql下载地址：https://dev.mysql.com/downloads/mysql/5.7.html#downloads
下载参考：
2、把下载的 MySQL 压缩包上传到 Linux 服务器
3、解压mysql-5.7.39-linux-glibc2.12-x86_64.tar.gz
tar -zxvf mysql-5.7.39-linux-glibc2.12-x86_64.tar.gz
4、把解压后的文件移动到 /usr/local 目录下
mv mysql-5.7.39-linux-glibc2.12-x86_64 /usr/local/mysql
5、创建MySQL组合用户
groupadd mysql
useradd -r -g mysql mysql
6、创建数据存储目录
mkdir /usr/local/mysql/data
7、修改相关权限
chown -R mysql:mysql /usr/local/mysql
chmod -R 777 /usr/local/mysql/
8、MySQL初始化操作，记录临时密码
cd /usr/local/mysql/bin
./mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
输出内容如下：
[root@hecs-399223 bin]# ./mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
2023-10-27T06:29:18.581041Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2023-10-27T06:29:18.826360Z 0 [Warning] InnoDB: New log files created, LSN=45790
2023-10-27T06:29:18.868528Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2023-10-27T06:29:18.928878Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 288aaf07-7492-11ee-8151-fa163e92ea6c.
2023-10-27T06:29:18.931018Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2023-10-27T06:29:19.409290Z 0 [Warning] A deprecated TLS version TLSv1 is enabled. Please use TLSv1.2 or higher.
2023-10-27T06:29:19.409316Z 0 [Warning] A deprecated TLS version TLSv1.1 is enabled. Please use TLSv1.2 or higher.
2023-10-27T06:29:19.409839Z 0 [Warning] CA certificate ca.pem is self signed.
2023-10-27T06:29:19.670575Z 1 [Note] A temporary password is generated for root@localhost: Y2Eu.8du7Fi<
注意：复制保存 MySQL初始化密码 Y2Eu.8du7Fi<
9、创建MySQL配置文件 /etc/my.cnf，执行如下命令即可自动创建
cat > /etc/my.cnf <<EOF
[mysqld]
port = 3306
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
max_connections=200
max_connect_errors=10
character-set-server=utf8mb4
default_authentication_plugin=mysql_native_password
[mysql]
default-character-set=utf8mb4
[client]
port=3306
default-character-set=utf8mb4
EOF
10、配置开机自启动
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
chmod 755 /etc/init.d/mysqld
chkconfig --add mysqld
chkconfig mysqld on
启动mysql
systemctl start mysqld
11、设置环境变量
echo "export PATH=$PATH:/usr/local/mysql/bin/" >> /etc/profile
source /etc/profile
12、通过临时密码登录MySQL并修改密码
#登录
mysql -u root -p
ALTER USER 'root' @'localhost' IDENTIFIED BY '123456';
flush privileges;
13、开启远程访问
grant all privileges on *.* to "root"@"%" identified by "123456";
flush privileges;
13、开启远程访问
grant all privileges on *.* to "root"@"%" identified by "123456";
flush privileges;
安装结束！
