下载安装sysql所需包

client包的位置:(https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-client-5.7.40-1.el7.x86_64.rpm) common包的位置:(https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-common-5.7.40-1.el7.x86_64.rpm) devel包的位置:(https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-devel-5.7.40-1.el7.x86_64.rpm) libs包的位置:(https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-libs-5.7.40-1.el7.x86_64.rpm) server包的位置:(https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-server-5.7.40-1.el7.x86_64.rpm)

 [root@node2 ~]# cd /usr/src/
 [root@node2 src]# ls
 debug  kernels
 [root@node2 src]# wget https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-client-5.7.40-1.el7.x86_64.rpm  https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-common-5.7.40-1.el7.x86_64.rpm https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-devel-5.7.40-1.el7.x86_64.rpm https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-libs-5.7.40-1.el7.x86_64.rpm https://repo.mysql.com/yum/mysql-5.7-community/el/7/x86_64/mysql-community-server-5.7.40-1.el7.x86_64.rpm 
 #wget下载过程省略
 [root@node2 src]# ls
 debug
 kernels
 mysql-community-client-5.7.40-1.el7.x86_64.rpm
 mysql-community-common-5.7.40-1.el7.x86_64.rpm
 mysql-community-devel-5.7.40-1.el7.x86_64.rpm
 mysql-community-libs-5.7.40-1.el7.x86_64.rpm
 mysql-community-server-5.7.40-1.el7.x86_64.rpm
 [root@node2 src]# yum -y localinstall *.rpm
 #yum本地安装过程省略

关闭防火墙和selinux

 [root@node2 ~]# systemctl disable --now firewalld
 Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
 Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
 [root@node2 ~]# vim /etc/selinux/config 
 # 修改SELINUX=disabled
 [root@node2 ~]# setenforce 0
 [root@node2 ~]# 

启动mysqld

 [root@node2 ~]# systemctl start mysqld
 [root@node2 ~]# systemctl  enable mysqld
 [root@node2 ~]# systemctl status mysqld
 ● mysqld.service - MySQL Server
    Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: >
    Active: active (running) since Tue 2022-12-27 20:29:08 CST; 43s ago
      Docs: man:mysqld(8)
            http://dev.mysql.com/doc/refman/en/using-systemd.html
  Main PID: 13600 (mysqld)
     Tasks: 27 (limit: 4723)
    Memory: 261.3M
    CGroup: /system.slice/mysqld.service
            └─13600 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.p>
 ​
 Dec 27 20:29:05 node2 systemd[1]: Starting MySQL Server...
 Dec 27 20:29:08 node2 systemd[1]: Started MySQL Server.
 ​
 [root@node2 ~]# ss -antl
 State    Recv-Q   Send-Q     Local Address:Port       Peer Address:Port   Process   
 LISTEN   0        128              0.0.0.0:22              0.0.0.0:*                
 LISTEN   0        80                     *:3306                  *:*                
 LISTEN   0        128                 [::]:22                 [::]:*                
 [root@node2 ~]# 
 ​

连接mysql

查找临时登录密码

 [root@node2 ~]# grep password /var/log/mysqld.log 
 2022-12-27T12:29:06.834696Z 1 [Note] A temporary password is generated for root@localhost: ?8:m9W3w<q,p
 [root@node2 ~]# 

修改登录密码

 [root@node2 ~]# mysql -uroot -p'?8:m9W3w<q,p'
 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 2
 Server version: 5.7.40
 ​
 Copyright (c) 2000, 2022, Oracle and/or its affiliates.
 ​
 Oracle is a registered trademark of Oracle Corporation and/or its
 affiliates. Other names may be trademarks of their respective
 owners.
 ​
 Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 ​
 mysql> set password = password("RunTime123!");
 Query OK, 0 rows affected, 1 warning (0.00 sec)
 ​
 mysql> 

连接mysql

 [root@node2 ~]# mysql -uroot -p
 Enter password: 
 Welcome to the MySQL monitor.  Commands end with ; or \g.
 Your MySQL connection id is 3
 Server version: 5.7.40 MySQL Community Server (GPL)
 ​
 Copyright (c) 2000, 2022, Oracle and/or its affiliates.
 ​
 Oracle is a registered trademark of Oracle Corporation and/or its
 affiliates. Other names may be trademarks of their respective
 owners.
 ​
 Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 ​
 mysql>