压缩包安装（建议查看mysql官方文档）
1.官方文档位置 https://dev.mysql.com/doc/refman/5.7/en/binary-installation.html
shell>groupadd mysql
shell>useradd -r -g mysql -s /bin/false mysql
shell>cd /usr/local
shell>tar zxvf ***.tar.gz
shell> mv *** /usr/local/mysql
shell> cd /usr/local/mysql
shell>cd mysql
shell>mkdir mysql-files
shell>chmod 750 mysql-files
shell>chown -R mysql.
shell>chgrp -R mysql.
shell>bin/mysql_install_db --user=mysql # 适合MySQL 5.7.5
shell>bin/mysqld --initialize --user=mysql #5.7.6以上版本 MySQL 5.7.6 and up
# 注意保存临时密码！！！
shell>bin/mysql_ssl_rsa_setup # MySQL 5.7.6 and up
shell>chown -R root.
shell>chown -R mysql data mysql-files
shell>bin/mysqld_safe --user=mysql &
# Next command is optional
shell>cp support-files /mysql.server /etc/init.d/mysql
2.账号测试和授权
bin/mysql -u root -p
进入mysql之后很多操作都会提示要重新设置面码
mysql>ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';
其它参考方案：
SET PASSWORD = PASSWORD('your new password');
ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
flush privileges;
远程访问权限：
grant all privileges on *.* to 'root' @'%' identified by '密码' with grant option;
flush privileges;
SELECT User, Host, HEX(authentication_string) FROM mysql.user;
这里用外网ip访问是否可以访问，如果连接不上，十有八九是防火墙的问题
service iptables stop 临时关闭防火墙
chkconfig iptables off 永久关闭防火墙
3.卸载mysql
1.关闭进程
service mysql stop
2.查看安装目录
whereis mysql
删除目录
rm -rf mysql
3.删除用户及组
id mysql
userdel mysql
4.删除配置文件
rm -rf /etc/my.cnf
rm -rf /etc/init.d/mysql*