Centos7安装mysql_root@localhost ~]# yum install -y mysql-community-

自己琢磨了好几天装了一半又放弃，各种百度都是装一半不是这问题就是这个过期，总结一下截止今天安装成功记录一下：

1、下载安装Mysql官网的YumRepository

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

注意: 我是刚装好了Centos7就开始装Mysql遇到了问题如下

执行命令：

[root@localhost ~]# yum -y install wget
已加载插件：fastestmirror
base                                                                                                                                                   | 3.6 kB  00:00:00     
extras                                                                                                                                                 | 2.9 kB  00:00:00     
updates                                                                                                                                                | 2.9 kB  00:00:00     
(1/4): base/7/x86_64/group_gz                                                                                                                          | 153 kB  00:00:00     
(2/4): extras/7/x86_64/primary_db                                                                                                                      | 249 kB  00:00:00     
(3/4): updates/7/x86_64/primary_db                                                                                                                     |  17 MB  00:00:03     
(4/4): base/7/x86_64/primary_db                                                                                                                        | 6.1 MB  00:00:25     
Determining fastest mirrors
 * base: mirrors.163.com
 * extras: mirrors.163.com
 * updates: mirrors.163.com
正在解决依赖关系
--> 正在检查事务
---> 软件包 wget.x86_64.0.1.14-18.el7_6.1 将被 安装
--> 解决依赖关系完成
 
依赖关系解决
 
==============================================================================================================================================================================
 Package                               架构                                    版本                                               源                                     大小
==============================================================================================================================================================================
正在安装:
 wget                                  x86_64                                  1.14-18.el7_6.1                                    base                                  547 k
 
事务概要
==============================================================================================================================================================================
安装  1 软件包
 
总下载量：547 k
安装大小：2.0 M
Downloading packages:
警告：/var/cache/yum/x86_64/7/base/packages/wget-1.14-18.el7_6.1.x86_64.rpm: 头V3 RSA/SHA256 Signature, 密钥 ID f4a80eb5: NOKEY             ]  0.0 B/s | 337 kB  --:--:-- ETA 
wget-1.14-18.el7_6.1.x86_64.rpm 的公钥尚未安装
wget-1.14-18.el7_6.1.x86_64.rpm                                                                                                                        | 547 kB  00:00:00     
从 file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 检索密钥
导入 GPG key 0xF4A80EB5:
 用户ID     : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
 指纹       : 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
 软件包     : centos-release-7-4.1708.el7.centos.x86_64 (@anaconda)
 来自       : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安装    : wget-1.14-18.el7_6.1.x86_64                                                                                                                               1/1 
  验证中      : wget-1.14-18.el7_6.1.x86_64                                                                                                                               1/1 
 
已安装:
  wget.x86_64 0:1.14-18.el7_6.1                                                                                                                                               
 
完毕！
[root@localhost ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[root@localhost ~]# sudo yum -y install wget
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
There are no enabled repos.
 Run "yum repolist all" to see the repos you have.
 To enable Red Hat Subscription Management repositories:
     subscription-manager repos --enable <repo>
 To enable custom repositories:
     yum-config-manager --enable <repo>
[root@localhost ~]# yum clean all
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
There are no enabled repos.
 Run "yum repolist all" to see the repos you have.
 To enable Red Hat Subscription Management repositories:
     subscription-manager repos --enable <repo>
 To enable custom repositories:
     yum-config-manager --enable <repo>

安装成功后在执行：wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

执行成功在执行：yum localinstall mysql57-community-release-el7-8.noarch.rpm -y

上面操作成功以后执行命令：

[root@localhost mysql-server]# yum install mysql-community-server -y

好家伙又出问题：

mysql-community-libs-compat-5.7.39-1.el7.x86_64.rpm 的公钥尚未安装

 失败的软件包是：mysql-community-libs-compat-5.7.39-1.el7.x86_64
 GPG  密钥配置为：file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

那就给他配置一个公钥：

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
yum -y install mysql-community-server

结果如下：

好目前为止是下好Mysql了接下来启动Mysql

[root@localhost mysql-server]# systemctl start mysqld

查看MySQL运行状态，运行状态如图：

[root@localhost mysql-server]# systemctl status mysqld

目前为止Mysql终于可以正常跑起来了，Mysql要求是必须要重置密码，那就先找出当前root用户的密码，命令如下：

[root@localhost mysql-server]# grep "password" /var/log/mysqld.log

 然后进入Mysql数据库:

[root@localhost mysql-server]# mysql -uroot -p
Enter password: 输入上图框出来的初始密码即可

 现在要修改初始密码的刚刚也说了如果不修改初始密码是不能操作数据库的，上图框出来的就是当前查到的初始密码：

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '输入要修改的密码';
//密码要求大小数字即符号组成

 修改成功如上图，开启远程方便后续想用Navicat连接数据库

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

%代表开启所有，可自行将%改为IP

然后再输入下面两行命令
 
mysql> flush privileges; 
mysql> exit

 为firewalld添加开放端口

添加mysql端口3306和Tomcat端口8080

[root@localhost ~]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
[root@localhost ~]# firewall-cmd --zone=public --add-port=8080/tcp --permanent

重新开启

[root@localhost mysql-server]# firewall-cmd --reload

 配置成功以后需要把Mysql语言修改成Utf8

[root@localhost mysql-server]# mysql -uroot -p //进入数据库
Enter password:                                //输入密码
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.39 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> status  //查看
--------------
mysql  Ver 14.14 Distrib 5.7.39, for Linux (x86_64) using  EditLine wrapper
 
Connection id:		3
Current database:	
Current user:		root@localhost
SSL:			Not in use
Current pager:		stdout
Using outfile:		''
Using delimiter:	;
Server version:		5.7.39 MySQL Community Server (GPL)
Protocol version:	10
Connection:		Localhost via UNIX socket
Server characterset:	latin1  //改成utf8
Db     characterset:	latin1  //改成utf8
Client characterset:	utf8  
Conn.  characterset:	utf8
UNIX socket:		/var/lib/mysql/mysql.sock
Uptime:			10 min 51 sec
 
Threads: 1  Questions: 13  Slow queries: 0  Opens: 113  Flush tables: 1  Open tables: 106  Queries per second avg: 0.019
--------------

exit退出Mysql,再到目录下修改对应内容

 将框起来的代码加上去保存更改然后退出：

注：此模式下操作命令如下

保存命令
按ESC键 跳到命令模式，然后：
:w   保存文件但不退出vi
 
:w file 将修改另外保存到file中，不退出vi
 
:w!   强制保存，不推出vi
 
:wq  保存文件并退出vi
 
:wq! 强制保存文件，并退出vi
 
:q 不保存文件，退出vi
 
:q! 不保存文件，强制退出vi
 
:e! 放弃所有修改，从上次保存文件开始再编辑

以上操作后在去查看

 到此为止Centos就安装及部署成功Mysql了！

接下来就是用Navicat连接Mysql啦：

查看当前的IP地址：输入ip addr 

2下面的就是当前的IP地址啦

然后打开Navicat

输入以下内容：

连接名：随意想起什么起什么

主机：就是刚刚Centos中查到的Ip地址 

端口：因为刚刚设置的端口为3306，如果你做别的修改就填你修改的

用户名：root

密码：就是刚刚修改的密码

 

到此为止就全部搞定了！