1.先停止數據庫服務器

service mysqld stop

2.vim /etc/my.cnf

3.配置文件添加skip-grant-tables

[root@VM_0_8_centos ~]# vim /etc/my.cnf# For advice on how to change settings please see# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html[mysqld]## Remove leading # and set to the amount of RAM for the most important data# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.# innodb_buffer_pool_size = 128M## Remove leading # to turn on a very important data integrity option: logging# changes to the binary log between backups.# log_bin## Remove leading # to set options mainly useful for reporting servers.# The server defaults are faster for transactions and fast SELECTs.# Adjust sizes as needed, experiment to find the optimal values.# join_buffer_size = 128M# sort_buffer_size = 2M# read_rnd_buffer_size = 2Mdatadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sockskip-grant-tables 此處！！！！！！# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0

4.重啟數據庫

systemctl restart mysql

5.登錄數據庫

mysql -uroot -p

如果詢問密碼，直接空密碼登錄

6.set password for root@localhost = password(’123456’);括號里面的密碼你自己修改。

7.mysql -uroot -p123456 登錄成功

PS：下面看下Mysql初始化root密碼和允許遠程訪問

mysql默認root用戶沒有密碼，輸入mysql ?u root 進入mysql

1、初始化root密碼

進入mysql數據庫

mysql>update user set password=PASSWORD(‘123456’) where User=’root’;

2、允許mysql遠程訪問,可以使用以下三種方式:

a、改表。

mysql -u root ?pmysql>use mysql;mysql>update user set host = ’%’ where user = ’root’;mysql>select host, user from user;

b、授權。

例如，你想root使用123456從任何主機連接到mysql服務器。

mysql>GRANT ALL PRIVILEGES ON *.* TO ’root’@’%’ IDENTIFIED BY ’123456’ WITH GRANT OPTION;

如果你想允許用戶jack從ip為10.10.50.127的主機連接到mysql服務器，并使用654321作為密碼

mysql>GRANT ALL PRIVILEGES ON *.* TO ’jack’@’10.10.50.127’ IDENTIFIED BY ’654321’ WITH GRANT OPTION;mysql>FLUSH RIVILEGES

c:在安裝mysql的機器上運行：

//進入MySQL服務器d:mysqlbin>mysql -h localhost -u root//賦予任何主機訪問數據的權限mysql>GRANT ALL PRIVILEGES ON *.* TO ’root’@’%’ WITH GRANT OPTION//使修改生效mysql>FLUSH PRIVILEGES//退出MySQL服務器mysql>EXIT

總結

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