CentOS7 安裝 MySql

安裝MySQL

先檢查系統是否裝有mysql

rpm -qa | grep mysql

刪除

yum remove mysql

下載

	# 版本
 wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
 wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

安裝

yum install mysql-community-release-el7-5.noarch.rpm

安裝服務

yum install mysql-server

授權

chown root /var/lib/mysql/

重新啓動服務

service mysqld restart	

查看默認密碼

cat /var/log/mysqld.log | grep 'temporary password'
or
grep 'temporary password' /var/log/mysqld.log

如果 ERROR 1045 (28000): Access denied for user ‘root’@‘localhost’ (using passwor:yes)

vim /etc/my.cnf
在[mysqld]後面任意一行添加“skip-grant-tables”用來跳過密碼驗證的過程

進入MySQL

mysql -u root -p

修改密碼

alter user ‘root’@‘localhost’ identified by ‘admin’;
set global validate_password_policy=0;
set global validate_password_length=1;
alter user ‘root’@‘localhost’ identified by ‘admin’;

mysql > use mysql;
mysql > update user set password=password('admin') where user='root';
mysql > exit;

5.7 以上

 update mysql.user set authentication_string=password('admin') where user='root';  

遠程登陸

GRANT ALL PRIVILEGES ON *.* TO root@"%" IDENTIFIED BY "admin";

顯示編碼

show variables like "%char%";

設置編碼

set names utf8;

使其生效

FLUSH PRIVILEGES