centos7 mounting MySQL (full configuration) at
1. Download and install the MySQL official Yum Repository
[root@localhost ~]# wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
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Mounted directly above commands Yum Repository
[root@localhost ~]# yum -y install mysql57-community-release-el7-10.noarch.rpm
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Installing MySQL Server
root@localhost ~]# yum -y install mysql-community-server
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2. MySQL database is set
to start MySQL
[root@localhost ~]# systemctl start mysqld.service
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View MySQL running state
[root@localhost ~]# systemctl status mysqld.service
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At this time, MySQL has started running properly, we need to find out the root password
[root@localhost ~]# grep "password" /var/log/mysqld.log
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Following command to log mysql
# mysql -uroot -p
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Enter the initial password, this time can not do anything, because MYSQL default password must be changed to normal use
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';
# 这里会遇到一个问题，新密码设置过于简单会报错
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See the full initial password rules with the following command
mysql>show variables like 'validate_password';
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Command may be modified by
mysql> set global validate_password_policy=0;
mysql> set global validate_password_length=1;
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Another problem is that Yum Repository, yum after each operation will automatically update, you need to uninstall this
[root@localhost ~]# yum -y remove mysql57-community-release-el7-10.noarch
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Telnet database following error message appeared
ERROR 2003 (HY000): MySQL of Can not Connect to Server ON ' xxx.xxx.xxx.xxx ',
the appropriate authority is no reason to grant
#任何主机
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
#指定主机
mysql>GRANT ALL PRIVILEGES ON *.* TO 'jack'@’10.10.50.127’ IDENTIFIED BY '654321' WITH GRANT OPTION;
# 然后刷新权限
mysql>flush privileges;
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The overall user table to modify the phase of the mysql database user login from a host
mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;
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MYSQL client provides the environment, but does not support Chinese, you can view the mysql character set by the following command
mysql>show variables like 'character_set%';
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It is shown below:
To get MySQL support Chinese, need to change the character set UTF-8, as follows
# vim /etc/my.cnf
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Into the following
[client]
port=3306
socket=/var/lib/mysql/mysql.sock
default-character-set=utf8
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
character-set-server=utf8
[mysql]
no-auto-rehash
default-character-set=utf8
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
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Restart mysql service
# service mysqld restart
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Re-check the database coding
show variables like 'character_set%';
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The following effects can be seen to have utf-8
