CentOS7安裝MySQL以及密碼修改

wget -i -c

yum -y install mysql57-community-release-el7-10.noarch.rpm

yum -y install mysql-community-server

至此mysql就安裝完成了，然後是對mysql的一些設定。

[root@localhost ~]# systemctl start  mysqld.service

此時mysql已經開始正常執行，不過要想進入mysql還得先找出此時root使用者的密碼，通過如下命令可以在日誌檔案中找出密碼：

grep "password" /var/log/mysqld.log

如下命令進入資料庫：

mysql -u root -p

mysql> alter user 'root'@'localhost' identified by 'new password';

image

原因是因為mysql有密碼設定的規範，具體是與validate_password_policy的值有關：

mysql完整的初始密碼規則可以通過如下命令檢視：

密碼的長度是由validate_password_length決定的，而validate_password_length的計算公式是：

validate_password_length = validate_password_number_count +validate_password_special_char_count + (2* validate_password_mixed_case_count)

mysql> set global validate_password_policy=0;

mysql> set global validate_password_length=1;

但此時還有乙個問題，就是因為安裝了yum repository，以後每次yum操作都會自動更新，需要把這個解除安裝掉：

[root@localhost ~]#yum -y remove mysql57-community-release-el7-10.noarch

mysql -u root -p

mysql>use mysql;
mysql>select 'host' from user where user='root';
mysql>update user set host = '%' where user ='root';
mysql>flush privileges;
mysql>select 'host'  from user where user='root';

第二句：選擇mysql庫

第三句：檢視mysql庫中的user表的host值（即可進行連線訪問的主機/ip名稱）

第六句：再重新檢視user表時，有修改。。

重起mysql服務即可完成。

開啟mysql配置檔案vi /etc/mysql/mysql.conf.d/mysqld.cnf

將bind-address = 127.0.0.1登出​

bind-address = 0.0.0.0 # 表示允許任何主機登陸mysql
port=3306 # 表示mysql執行埠為3306

grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;

flush privileges;
/etc/init.d/mysql start

mysql5.6

grant all privileges on *.* to root@'%' identified by "mysql_pwd" with grant option;
grant all privileges on *.* to root@'localhost' identified by "mysql_pwd" with grant option;
grant all privileges on *.* to root@'127.0.0.1' identified by "mysql_pwd" with grant option;
drop database if exists test;
use mysql;
delete from user where not (user='root');
delete from db where user='';
update user set password=password('mysql_pwd') where user='root' and host='127.0.0.1' or host='%' or host='localhost';
delete from user where password='';
flush privileges;
select user,password,host from mysql.user;
exit;
mysql5.7:
grant all privileges on *.* to root@'%' identified by "mysql_pwd" with grant option;
grant all privileges on *.* to root@'localhost' identified by "mysql_pwd" with grant option;
grant all privileges on *.* to root@'127.0.0.1' identified by "mysql_pwd" with grant option;
drop database if exists test;
use mysql;
delete from user where not (user='root');
delete from db where user='';
delete from user where authentication_string='';
update mysql.user set authentication_string=password('mysql_pwd') where user='root' and host='127.0.0.1' or host='%' or host='localhost';
flush privileges;
select user,authentication_string,host from mysql.user;
exit;

centos7原始碼安裝mysql5 7以及解除安裝教程

2.解壓到指定目錄 tar zxvf mysql 5.7.26 linux glibc2.12 x86 64.tar.gz c usr local 3.重新命名 mv usr local mysql 5.7.26 linux glibc2.12 x86 64 usr local mysql 4.新建...

centos7以yum方式安裝docker

yum包更新到最新 sudo yum update 設定yum源為阿里雲 sudo yum config manager add repo 安裝docker sudo yum install docker ce 檢視docker版本 docker v 設定ustc的映象 ustc docker mi...

centos 7 安裝MySQL 筆記

1.安裝 wget rpm ivh mysql community release el7 5.noarch.rpm yum install mysql community server 成功安裝之後重啟mysql服務 service mysqld restart 初次安裝mysql是root賬戶是...