Centos7用rpm安装MySQL数据库

在Centos7下使用rpm安装下mysql的流程：  首先进入mysql官网的下载地址：​​  https://dev.mysql.com/downloads/mysq​​l/，然后在下载里面把os选择为Red Hat Enterprise Linux 7 / Oracle Linux 7 ，把os的版本选择为all。    在下方的下载链接找到以下文件：

mysql-community-client-5.7.19-1.el7.x86_64.rpm

mysql-community-common-5.7.19-1.el7.x86_64.rpm

mysql-community-devel-5.7.19-1.el7.x86_64.rpm

mysql-community-libs-5.7.19-1.el7.x86_64.rpm

mysql-community-libs-compat-5.7.19-1.el7.x86_64.rpm

mysql-community-server-5.7.19-1.el7.x86_64.rpm

因为我是Centos7 64位版本，所以选择了以上文件，如果你主机是Centos6 或者是32位版本，请找到对应版本文件，然后把六个文件下载齐全。  接下来依次按以下命令按顺序安装这些文件：

rpm -ivh mysql-community-common-5.7.19-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-5.7.19-1.el7.x86_64.rpm

rpm -ivh mysql-community-devel-5.7.19-1.el7.x86_64.rpm

rpm -ivh mysql-community-libs-compat-5.7.19-1.el7.x86_64.rpm

rpm -ivh mysql-community-client-5.7.19-1.el7.x86_64.rpm

rpm -ivh mysql-community-server-5.7.19-1.el7.x86_64.rpm

至此，mysql5.7所有文件安装完毕，接下来就是开启服务测试了。

1.首先关闭mysql服务：

service mysqld stop（systemctl stop mysqld.service）

2.然后修改配置文件：

vim /etc/my.cnf

3.接下来加入一句代码即可空密码登录mysql：

# Disabling symbolic-links is recommended to prevent assorted security risks
skip-grant-tables     #添加这句话，这时候登入mysql就不需要密码
symbolic-links=0

4.开启mysql服务：

service mysqld start (systemctl start mysqld.service)

5.空密码登录mysql：

mysql -u root -p #输入命令回车进入，出现输入密码提示直接回车

6.设置mysql密码：

mysql> set password for root@localhost = password('123456');
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql> flush privileges;  #更新权限
Query OK, 0 rows affected (0.00 sec)
mysql> set password for root@localhost = password('123456'); or update user set authentication_string=PASSWORD("123456") where user="root";
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql>flush privileges; #更新权限
mysql>quit; #退出
service mysqld stop # 停止mysql服务, 恢复mysql配置
vim /etc/my.cnf     #修改配置文件
# Disabling symbolic-links is recommended to prevent assorted security risks
# skip-grant-tables # 注释掉这句话
symbolic-links=0
#添加下面两句话
character_set_server=utf8
skip-name-resolve
service mysqld start # 启动mysql服务
mysql -uroot -p # 输入新密码登录

远程修改登入密码

[root@localhost java] mysql -uroot -p  
use mysql ; //切换mysql数据库
update user set host='%' where host='localhost';
exit;

7.设置mysql开机自启：

systemctl enable mysqld