Navicat连接linux服务器的mysql。

安装虚拟机

https://blog.csdn.net/qq_35206244/article/details/79339453
界面如下：

安装mysql

使用yum安装
参考
https://blog.csdn.net/qq_41510551/article/details/110731610
有一个值得注意的点，我第一次安装的时候就自己给挖坑了

如果自己下了一个mysql80或者50的就不需要切换版本，命令：disable/enable

如果已经用了7条命令可以使用如下方法解决：

[root@localhost /]# rpm -qa | grep -i mysql
mysql80-community-release-el7-3.noarch
[root@localhost /]# yum remove mysql80-community-release-el7-3.noarch
已加载插件：fastestmirror, langpacks
正在解决依赖关系
--> 正在检查事务
---> 软件包 mysql80-community-release.noarch.0.el7-3 将被 删除
--> 解决依赖关系完成依赖关系解决=================================================================================================================================================================================================================================================Package                                                                 架构                                                 版本                                                 源                                                       大小
=================================================================================================================================================================================================================================================
正在删除:mysql80-community-release                                               noarch                                               el7-3                                                installed                                                31 k事务概要
=================================================================================================================================================================================================================================================
移除  1 软件包安装大小：31 k
是否继续？[y/N]：y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
警告：RPM 数据库已被非 yum 程序修改。正在删除    : mysql80-community-release-el7-3.noarch                                                                                                                                                                                       1/1
警告：文件 /etc/yum.repos.d/mysql-community.repo: 移除失败: 没有那个文件或目录
警告：文件 /etc/yum.repos.d/mysql-community-source.repo: 移除失败: 没有那个文件或目录验证中      : mysql80-community-release-el7-3.noarch                                                                                                                                                                                       1/1 删除:mysql80-community-release.noarch 0:el7-3                                                                                                                                                                                                       完毕！
完毕！
[root@localhost /]# rpm -qa | grep -i mysql
[root@localhost /]# ll
总用量 32
lrwxrwxrwx.   1 root root     7 8月   7 2021 bin -> usr/bin
dr-xr-xr-x.   5 root root  4096 8月   7 2021 boot
drwxr-xr-x.  20 root root  3340 8月   7 13:17 dev
drwxr-xr-x. 145 root root 12288 8月   7 13:19 etc
drwxr-xr-x.   3 root root    17 8月   7 2021 home
lrwxrwxrwx.   1 root root     7 8月   7 2021 lib -> usr/lib
lrwxrwxrwx.   1 root root     9 8月   7 2021 lib64 -> usr/lib64
drwxr-xr-x.   2 root root    31 8月   7 2021 liuqing
drwxr-xr-x.   2 root root     6 4月  11 2018 media
drwxr-xr-x.   2 root root     6 4月  11 2018 mnt
drwxr-xr-x.   3 root root    16 8月   7 13:16 opt
dr-xr-xr-x. 232 root root     0 8月   7 13:17 proc
dr-xr-x---.  14 root root  4096 8月   7 13:19 root
drwxr-xr-x.  44 root root  1280 8月   7 13:34 run
lrwxrwxrwx.   1 root root     8 8月   7 2021 sbin -> usr/sbin
drwxr-xr-x.   2 root root     6 4月  11 2018 srv
dr-xr-xr-x.  13 root root     0 8月   7 13:17 sys
drwxrwxrwt.  23 root root  4096 8月   7 13:34 tmp
drwxr-xr-x.  13 root root   155 8月   7 2021 usr
drwxr-xr-x.  21 root root  4096 8月   7 2021 var

再按照连接执行就可以啦

用Navicat连接

常规和SSL配置：
连接名：
主机名或AP地址：192.168.** ./localhost
用户名：root
密码****
连接测试*
报错1：

解决办法：
使用命令修改%为通配符，可以允许主机ip192.168.172.7**访问，如果最后不是1开始就不用执行这步操作

use mysql;
select host from user where user='root';

报错2：

修改的原因是因为MySQL8使用了新的认证插件，也就是上面错误中提到的“caching_sha2_password”，一些低版本的Navicat还不支持这个新的插件，所以才会出现错误。navicat12.0.28已经支持新的验证方式。

解决办法：

mysql> select host,user,plugin,authentication_string from mysql.user;
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| host      | user             | plugin                | authentication_string                                                  |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| %         | root             | caching_sha2_password | $A$005$byr {OmJ`rBf%!Q0KeqZ3a/W8Wn0/38ZDGvLbSWYDXqrlokYnxiCaOmX3 |
| localhost | mysql.infoschema | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session    | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys        | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
mysql> ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
Query OK, 0 rows affected (0.01 sec)mysql> select host,user,plugin,authentication_string from mysql.user;
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| host      | user             | plugin                | authentication_string                                                  |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| localhost | mysql.infoschema | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session    | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys        | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root             | mysql_native_password | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9                              |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
4 rows in set (0.00 sec)

连接成功。