centos7下安装mysql6初始化安装密码的方法

先停止数据库服务器

service  mysqld stop

vim /etc/my.cnf

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 = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
skip-grant-tables      此处！！！！！！
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

重启数据库

 systemctl restart mysql

登录数据库

mysql -uroot -p

如果询问密码，直接空密码登录

set password for root@localhost = password('123456');括号里面的密码你自己修改。

mysql -uroot -p123456 登录成功

PS：下面看下Mysql初始化root密码和允许远程访问

mysql默认root用户没有密码，输入mysql ?u root 进入mysql

初始化root密码

进入mysql数据库

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

允许mysql远程访问,可以使用以下三种方式:

a、改表。

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

b、授权。

例如，你想root使用123456从任何主机连接到mysql服务器。

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

如果你想允许用户jack从ip为10.10.50.127的主机连接到mysql服务器，并使用654321作为密码

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

c:在安装mysql的机器上运行：

//进入MySQL服务器
d:\mysql\bin\>mysql -h localhost -u root
//赋予任何主机访问数据的权限
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION
//使修改生效
mysql>FLUSH PRIVILEGES
//退出MySQL服务器
mysql>EXIT

总结

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