1、下载tar包，这里使用wget从官网下载
https://dev.mysql.com/downloads/mysql/
2、将mysql安装到/usr/local/mysql下
解压
tar -xvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
mv /usr/local/mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/mysql
3、新建data目录
mkdir /usr/local/mysql/data
4、新建mysql用户、mysql用户组
mysql用户组
groupadd mysql
mysql用户
useradd mysql -g mysql
5、将/usr/local/mysql的所有者及所属组改为mysql
chown -R mysql.mysql /usr/local/mysql
6、配置
/usr/local/mysql/bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data
如果出现以下错误：
2018-07-14 06:40:32 [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize
2018-07-14 06:40:32 [ERROR] Child process: /usr/local/mysql/bin/mysqldterminated prematurely with errno= 32
2018-07-14 06:40:32 [ERROR] Failed to execute /usr/local/mysql/bin/mysqld --bootstrap --datadir=/usr/local/mysql/data --lc-messages-dir=/usr/local/mysql/share --lc-messages=en_US --basedir=/usr/local/mysql
则使用以下命令（记得把上面命令生成的data文件内容删掉）：
/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize
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
完成后重复上个步骤，继续安装（同样把上面data文件内容删掉）：
/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize
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
# 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
(有时候回报如下错误：
1.service mysql start;
报错：mysql is neither service nor target!?
2.systemctl start mysql:
报错：sysemctl start mysql ： Failed to star mysql.service: Unit mysql.service failed to load: No such file ....)
解决方案：依次执行下面命令
systemctl unmask mysql.service
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;
update user set host='%' where user = 'root';
flush privileges;
eixt;
如果不行，直接关掉linux的防火墙。
systemctl disable firewalld
这样还不行的话，检查服务器入栈入栈规则。
12、添加快捷方式
ln -s /usr/local/mysql/bin/mysql /usr/bin