Mysql数据库安装

• 下载tar包

1. 安装包下载：https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

• 将mysql安装到/usr/local/mysql下

1. 重命名mv /usr/local/mysql-5.7.25-linux-glibc2.12-x86_64 /usr/local/mysql
2. 移动mv mysql-5.7.25-linux-glibc2.12-x86_64 /usr/local/
3. 解压tar -xvf mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

• 新建data目录

1. mkdir /usr/local/mysql/data

• 新建mysql用户、mysql用户组

1. mysql用户组：groupadd mysql
2. mysql用户：useradd mysql -g mysql

• 将/usr/local/mysql的所有者及所属组改为mysql

1. chown -R mysql.mysql /usr/local/mysql

• 安装mysql

1. 执行命令：/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize
2. 编辑/etc/my.cnf
   [mysqld]
   datadir=/usr/local/mysql/data
   basedir=/usr/local/mysql
   socket=/tmp/mysql.sock
   user=mysql
   port=3306
   character-set-server=utf8
   # 取消密码验证
   skip-grant-tables
   symbolic-links=0
   [mysqld_safe]
   log-error=/var/log/mysqld.log
   pid-file=/var/run/mysqld/mysqld.pid

• 开启服务

1. 将mysql加入服务  cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
2. 开机自启：chkconfig mysql on
3. 开启服务：service mysql start

• 设置密码

1. 登录（由于/etc/my.cnf中设置了取消密码验证，所以此处密码任意）/usr/local/mysql/bin/mysql -u root -p
2. 操作mysql数据库 use mysql;
3. 修改密码

      update user set authentication_string=password('你的密码') where user='root';

      flush privileges;

• 将/etc/my.cnf中的skip-grant-tables删除
• 登录再次设置密码（不知道为啥如果不再次设置密码就操作不了数据库了）

1. /usr/local/mysql/bin/mysql -u root -p
2. ALTER USER 'root'@'localhost' IDENTIFIED BY '修改后的密码';

• 允许远程连接

1. /usr/local/mysql/bin/mysql -u root -p
2. use mysql;
3. update user set host='%' where user = 'root';
4. flush privileges;

目录

https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

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

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