11 linux安装mysql5.7

1. 下载wget（一个下载文件的工具）： yum -y install wget

2. 下载tar包，这里使用wget从官网下载：
   wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

//wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz

3. 解压
   tar -xvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

4 . 移动
mv mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/

5 . 重命名
mv /usr/local/mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/mysql

6. 新建data目录
   mkdir /usr/local/mysql/data

7 mysql用户组
groupadd mysql

mysql用户
useradd mysql -g mysql

8将/usr/local/mysql的所有者及所属组改为mysql
chown -R mysql.mysql /usr/local/mysql

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

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如果出现以下错误：
/usr/local/mysql/bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory

则执行以下命令：
yum -y install numactl

完成后继续安装：
/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize

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10 vim /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
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# skip-grant-tables
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

7、开启服务

将mysql加入服务

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

开机自启

chkconfig mysql on

开启

service mysql start

8、设置密码

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

操作mysql数据库

use mysql;

修改密码

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

flush privileges;

exit;

9、将/etc/my.cnf中的skip-grant-tables删除

10、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）

/usr/local/mysql/bin/mysql -u root -p

ALTER USER 'root'@'localhost' IDENTIFIED BY '修改后的密码';

exit;

11、允许远程连接

/usr/local/mysql/bin/mysql -u root -p

use mysql;

GRANT ALL PRIVILEGES ON . TO 'root'@'%' IDENTIFIED BY '123456'

flush privileges;

eixt;

12、添加快捷方式

ln -s /usr/local/mysql/bin/mysql /usr/bin

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在Win10上安装并配置完成MySQL-5.7.22，修改第一次密码并登陆后，不论输入什么语句，都出现提示“You must reset your password using ALTER USER...”的提示错误语句，解决办法如下：

SET PASSWORD = PASSWORD('新密码');
ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
FLUSH PRIVILEGES;
quit后，重新使用新密码登陆即可进行操作了。