mysql can not connect to mysql server

mysql can not connect to mysql server,第1张

解决Can't connect to MySQL server on XXX<div class="audio-wp audio-wp-1" data-text="解决Can" t="" connect="" to="" mysql="" server="" xxx在用navicat="" for="" mysql连接数据库时出现报错:2003 -  Can't connect to MySQL server on "localhost" (10061)解决方法请参照如下步骤' data-for=''>听语音

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更新:2017-09-04 08:08

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在用Navicat for mysql连接数据库时出现报错:

2003 -  Can't connect to MySQL server on "localhost" (10061)

解决方法请参照如下步骤

工具/原料

Navicat for mysql

检查Mysql服务是否正常启动

1

首先排除密码输入密码,如果是密码不对会有如下提示信息的

2

进入控制面板,找到管理工具

3

找到【服务】,双击进入服务窗口

4

检查Mysql服务是否正常启动,如下可以看出服务并没启动

5

右击鼠标,启动mysql服务,再次连接,正常。

END

检查数据库连接数是否超过限制

用root用户登录mysql数据库,统计当前连接数,检查是否超过mysql配置文件中设置的最大连接数。

0.客户端登陆报错

luobiaodeMacBook-Air:~ luobiao$ ssh root@39.101.204.8

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!    @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!

Someone could be eavesdropping on you right now (man-in-the-middle attack)!

It is also possible that a host key has just been changed.

The fingerprint for the ECDSA key sent by the remote host is

SHA256:jN2L7Ebd8ZV03ErBmMpGwHybqNBnLqOX0TTk9TbgzZs.

Please contact your system administrator.

Add correct host key in /Users/luobiao/.ssh/known_hosts to get rid of this message.

Offending ECDSA key in /Users/luobiao/.ssh/known_hosts:8

ECDSA host key for 39.101.204.8 has changed and you have requested strict checking.

Host key verification failed.

解决:

这里面,有一句很关键。

ECDSA host key for 39.101.204.8  has changed and you have requested strict checking.

Host key verification failed.

一般这个问题,是你重置过你的服务器后。你再次想访问会出现这个问题。

ssh-keygen -R  39.101.204.8 

1.安装mysql报错

mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory

解决:

经过百度说是缺少 libaio.so.1  这个包.这个包是干什么的呢?

我也没查看到?试试先安装这个包。

yum -y install libaio  

安装后,解决该问题。

2.[ root @later01 /errlog ]# /etc/init.d/mysqld start 

Starting MySQL.2020-04-11T16:49:17.645735Z mysqld_safe error: log-error set to '/errlog/3306/mysql.log', however file don't exists. Create writable for user 'mysql'.

解决: 创建日志文件并赋权 

[ root @later01 /errlog/3306 ]# echo "" >mysql.log 

[ root @later01 /errlog/3306 ]# chown -R mysql.mysql /errlog/

3.2020-04-11T16:52:12.084460Z 0 [ERROR] InnoDB: The innodb_system data file './ibdata1' is of a different size 768 pages (rounded down to MB) than the 4864 pages specified in the .cnf file!

解决:注释my.cnf 中的

#innodb_data_file_path=ibdata1:76Mibdata2:100Mibdata3:100M:autoextend

1.Starting MySQL.Manager of pid-file quit without updating fi[失败]

关于这个错误原因有很多,最大的可能是没有创建测试数据库,可以用/usr/local/mysql/scripts/mysql_install_db –user=mysql命令进行创建;另外一个原因可能是权限设置问题,需要赋予mysql的data权限,可以用chmod -R 命令。

2.FATAL ERROR: Could not find /home/mysql/bin/my_print_defaults If you are using a binary release,you must run this script from

within the directory the archive extracted into. If you compiled

MySQL yourself you must run ‘make install’ first.

这个错误,是没有指明mysql的data路径导致的,可以很简单的进行解决:

vim /etc/my.cnf

在[mysqld] 后面加上路径:

basedir = /usr/local/mysql

datadir =/opt/data;

3.-bash: mysql: command not found

用mysql命令进行登陆mysql报错,原因是没有设置环境变量,需要设置,或者进入到bin目录进行登陆cd /usr/local/mysql/bin

mysql -u root

4.ERROR 1130: Host ’192.168.1.3′ is not allowed to connect to this MySQL server

用mysql远程工具链接数据库报错,这个错误原因是没有开放远程链接功能,可以在mysql里面输入如下命令进行解决:GRANT ALL PRIVILEGES ON *.* TO ’root‘@’%' IDENTIFIED BY ’password’ WITH GRANT OPTION


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