error: 'Can't connect to local MySQL server through socket '/tmp/mysql.sock' '

Posted 2020-09-14

 1、今天安装了一个mysql 5.7 的二进制安装方式，在连接mysql数据库的时候报了如下错误：

[[email protected] mysql]# mysql 

ERROR 2002 (HY000): Can‘t connect to local MySQL server through socket ‘/tmp/mysql.sock‘ (2)

2、根据提示应该是sock文件不在，通过查看进程配置，发现如下

[[email protected] bin]# ps -ef | grep mysql

root      9196  3125  0 11:18 pts/2    00:00:00 tail -f mysqld.log

root     11404     1  0 14:13 pts/1    00:00:00 /bin/sh /home/mysql/sysinfo/mysql/bin/mysqld_safe --datadir=/my_data/sysinfo --pid-file=/my_data/sysinfo/iccsdb01.pid

mysql    11616 11404  0 14:13 pts/1    00:00:00 /home/mysql/sysinfo/mysql/bin/mysqld --basedir=/home/mysql/sysinfo/mysql --datadir=/my_data/sysinfo --plugin-dir=/home/mysql/sysinfo/mysql/lib/plugin --user=mysql --log-error=/var/log/mysqld.log --pid-file=/my_data/sysinfo/iccsdb01.pid --socket=/var/lib/mysql/mysql.sock

由上可知mysql 默认的mysql.sock 是在/var/lib/mysql/mysql.sock，

但Linux系统总是去/tmp/mysql.sock查找，所以会报错

3、创建连接文件到指定目录上

ln -s /var/lib/mysql/mysql.sock  /tmp/mysql.sock

4、测试连接成功登陆

[[email protected] /]# mysql -u root -p

Enter password: 

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 5

Server version: 5.7.18 MySQL Community Server (GPL)

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

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> 

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