wget http://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm
未安装wget的同学执行以下命令安装
sudo yum install wget
安装MYSQL (这个过程打开要执行几分钟)
sudo rpm -ivh mysql57-community-release-el7-8.noarch.rpm
sudo yum install mysql-server
sudo grep 'temporary password' /var/log/mysqld.log
输出内容如下: 如果没有输出,说明是之前安装的mysql导致此路径下已经存在此文件了,PS:/var/log/mysqld.log 中找不到临时密码
1.删除原来安装过的mysql残留的数据(这一步非常重要,问题就出在这)
rm -rf /var/lib/mysql
2.重启mysqld服务
systemctl restart mysqld
3.再去找临时密码
grep 'temporary password' /var/log/mysqld.log
尝试用 mysql -uroot -p 发现登陆不成功:解决办法如下:
[root@izwz91h49n3mj8r232gqwez ~]# vim /etc/my.cnf
加入在 [mysqld]一栏下面加入一行
skip-grant-tables
[root@izwz91h49n3mj8r232gqwez etc]# service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service
[root@izwz91h49n3mj8r232gqwez etc]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.41 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> update user set password=password("root") where user="root";
Query OK, 0 rows affected (0.00 sec)
Rows matched: 5 Changed: 0 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> quit
[root@izwz91h49n3mj8r232gqwez etc]# vim my.cnf
如下图 注释掉一行
skip-grant-tables
[root@izwz91h49n3mj8r232gqwez etc]# service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service
如果你想要设置一个简单的测试密码的话,比如设置为123456,会提示这个错误,报错的意思就是你的密码不符合要求
mysql> alter user 'root'@'localhost' identified by '123456';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
首先,修改validate_password_policy参数的值
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.00 sec)
validate_password_length(密码长度)参数默认为8,我们修改为1
mysql> set global validate_password_length=1;
Query OK, 0 rows affected (0.00 sec)
4,完成之后再次执行修改密码语句即可成功
mysql> alter user 'root'@'localhost' identified by '123456';
Query OK, 0 rows affected (0.00 sec)
解决办法:
1。 改表法。
可能是你的帐号不允许从远程登陆,只能在localhost。这个时候只要在localhost的那台电脑,登入mysql后,更改 "mysql" 数据库里的 "user" 表里的 "host" 项,从"localhost"改称"%"
mysql -u root -pvmwaremysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;
2. 授权法。
例如,你想myuser使用mypassword从任何主机连接到mysql服务器的话。
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
FLUSH PRIVILEGES;
如果你想允许用户myuser从ip为192.168.1.6的主机连接到mysql服务器,并使用mypassword作为密码
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
FLUSH PRIVILEGES;
如果你想允许用户myuser从ip为192.168.1.6的主机连接到mysql服务器的dk数据库,并使用mypassword作为密码
GRANT ALL PRIVILEGES ON dk.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;
FLUSH PRIVILEGES;
我用的第一个方法,刚开始发现不行,在网上查了一下,少执行一个语句 mysql>FLUSH RIVILEGES 使修改生效.就可以了
另外一种方法,不过我没有亲自试过的,在csdn.net上找的,可以看一下.
在安装mysql的机器上运行:
1、d:/mysql/bin/>mysql -h localhost -u root //这样应该可以进入MySQL服务器
2、mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION //赋予任何主机访问数据的权限
3、mysql>FLUSH PRIVILEGES //修改生效
4、mysql>EXIT //退出MySQL服务器
这样就可以在其它任何的主机上以root身份登录啦!
如有问题+Q : 790228724