下载
image.png
下载后将文件上传到服务器，并赋予755可执行权限
安装
1、解压
[root@localhost soft]# tar -xvf mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz
复制解压后的mysql目录
[root@localhost soft]# cp -r mysql-5.7.23-linux-glibc2.12-x86_64 /usr/local/mysql
2、添加用户组和用户
添加用户组
[root@localhost soft]# groupadd mysql
添加用户mysql且添加到用户组mysql
[root@localhost soft]# useradd -g mysql mysql
3、安装
安装前需要卸载系统自带的Mysql
- 检测系统是否安装：
[root@localhost soft]# rpm -qa | grep mysql
[root@localhost soft]# rpm -qa | grep mariadb
- 检测到已安装，卸载之：
[root@localhost soft]# yum -y remove mysql*
[root@localhost soft]# yum -y remove mariadb*
- 安装
注：mysql目录下没有data，需要手动创建
将mysql及其下所有的目录所有者和组均设为mysql
[root@localhost soft]# cd /usr/local/mysql/
[root@localhost soft]# chown -R mysql:mysql *
- 初始化
[root@localhost soft]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/usr/local/mysql/data --basedir=/usr/local/mysql
初始化成功信息如下所示：
2018-08-21T02:51:32.462338Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-08-21T02:51:32.970357Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-08-21T02:51:33.028257Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-08-21T02:51:33.035443Z 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: 1cb0d086-a4ed-11e8-a804-000c29fe8b9d.
2018-08-21T02:51:33.036418Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2018-08-21T02:51:33.037704Z 1 [Note] A temporary password is generated for root@localhost: 2balpgvBcf!1
注意最后一行，这也是和之有版本不同的地方，它给了root一个初始密码，后面要登录的时候要用到这个密码。
- 配置
[root@localhost soft]# vi /etc/my.cnf
[mysqld]
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
注意，tmp目录不存在，请自行创建。
4、配置环境变量
[root@localhost soft]# vi /etc/profile
export PATH=$PATH:/usr/local/mysql/bin
[root@localhost soft]# source /etc/profile
5、设置mysql以服务运行并且开机启动
[root@localhost soft]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql
[root@localhost soft]# chmod +x /etc/init.d/mysql
设置开机启动
[root@localhost soft]# chkconfig mysql on
6、启动
[root@localhost soft]# service mysql start
7、修改密码
方法一
mysql> update mysql.user set authentication_string=password('123456') where user='root' and Host = 'localhost';
mysql> flush privileges;
方法二
mysql> alter user 'root'@'localhost' identified by '123456';
mysql> flush privileges;
方法三
mysql> set password for 'root'@'localhost'=password('123456');
mysql> flush privileges;
8、开启远程访问
[root@hadoop001 ~]# mysql -u root -p
mysql> use mysql;
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
mysql> FLUSH PRIVILEGES;
注：如果远程无法访问，请检查mysql端口是否被防火墙拦截
9、问题
配置完出现如下问题
image.png
解决：
初始化的时候有个密码，只是相当于临时密码，直接执行设置密码即可:
alter user user() identified by "root";
