CentOS7安装调试Mysql数据库的步骤详解【实例】

本实例要求下载并安装调试Mysql数据库。

第一步：下载Mysql数据库安装所需的全部软件。

我已提前下载好数据库软件，直接在服务器下载即可，如下：

通过scp直接下载：

[root@agt20 ~]# scp root@192.168.122.10:/root/mysql* /root/

软件如下图：

[root@agt20 ~]# ls mysql-*mysql-5.7.17.tarmysql-community-client-5.7.17-1.el7.x86_64.rpmmysql-community-common-5.7.17-1.el7.x86_64.rpmmysql-community-devel-5.7.17-1.el7.x86_64.rpmmysql-community-embedded-5.7.17-1.el7.x86_64.rpmmysql-community-embedded-compat-5.7.17-1.el7.x86_64.rpmmysql-community-embedded-devel-5.7.17-1.el7.x86_64.rpmmysql-community-libs-5.7.17-1.el7.x86_64.rpmmysql-community-libs-compat-5.7.17-1.el7.x86_64.rpmmysql-community-minimal-debuginfo-5.7.17-1.el7.x86_64.rpmmysql-community-server-5.7.17-1.el7.x86_64.rpmmysql-community-test-5.7.17-1.el7.x86_64.rpm

第二步：通过yum进行安装，起服务器并查看

[root@agt20 ~]# yum -y install mysql-*.rpm[root@agt20 ~]# systemctl restart mysqld[root@agt20 ~]# systemctl enable mysqld[root@agt20 ~]# systemctl status mysqld.service /u25cf mysqld.service - MySQL ServerLoaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)Active: active (running) since /u4e8c 2019-10-15 11:29:11 CST; 1min 15s agoDocs: man:mysqld(8)http://dev.mysql.com/doc/refman/en/using-systemd.htmlMain PID: 31584 (mysqld)CGroup: /system.slice/mysqld.service/u2514/u250031584 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid...10/u6708 15 11:28:42 agt20.tedu.cn systemd[1]: Starting MySQL Server...10/u6708 15 11:29:11 agt20.tedu.cn systemd[1]: Started MySQL Server.[root@agt20 ~]#

第三步：连接MySQL服务器，修改密码；

1）查看初始密码

[root@agt20 ~]# grep -i 'password' /var/log/mysqld.log 2019-10-15T03:28:55.200931Z 1 [Note] A temporary password is generated for root@localhost: r3qhDysMrM)

2）使用初始密码连接mysql服务

[root@agt20 ~]# mysql -uroot -p'r3qhDysMrM)'mysql: [Warning] Using a password on the command line interface can be insecure.Welcome to the MySQL monitor. Commands end with ; or /g.Your MySQL connection id is 4Server version: 5.7.17Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '/h' for help. Type '/c' to clear the current input statement.mysql>

3）重置数据库管理员roo本机登录密码

mysql> alter user root@localhost identified by 'Pwd@123...';Query OK, 0 rows affected (0.00 sec)

4）修改密码策略

mysql> set global validate_password_policy=0;Query OK, 0 rows affected (0.01 sec)mysql> set global validate_password_length=6;Query OK, 0 rows affected (0.00 sec)mysql> alter user root@localhost identified by 'pwd@123';Query OK, 0 rows affected (0.00 sec)