centos7下安装mysql6初始化安装密码的方法

1.先停止数据库服务器

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 = 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

4.重启数据库

 systemctl restart mysql

5.登录数据库

mysql -uroot -p

如果询问密码，直接空密码登录

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

7.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

1、初始化root密码

进入mysql数据库

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

2、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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