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：
[root@iccsdb01 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
[root@iccsdb01 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
解决方法一
1、创建连接文件到指定目录上
ln -s /var/lib/mysql/mysql.sock /tmp/mysql.sock
2、测试连接成功登陆
[root@iccsdb01 /]# 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>
解决方法二
修改“/etc/my.cnf”配置文件，在配置文件中添加“[client]”选项和“[mysql]”选项，并使用这两个选项下的“socket”参数值，与“[mysqld]”选项下的“socket”参数值，指向的socket文件路径完全一致。如下：
| 1 2 3 4 5 6 7 8 9 10 11 12 | [mysqld] datadir = / my_data / sysinfo socket = / var / lib / mysql / mysql.sock ...省略n行... [client] default - character - set = utf8 socket = / var / lib / mysql / mysql.sock [mysql] default - character - set = utf8 socket = / var / lib / mysql / mysql.sock |
修改完后，重启mysqld服务，即可解决此问题。
本文转自 yuri_cto 51CTO博客，原文链接：http://blog.51cto.com/laobaiv1/1919251，如需转载请自行联系原作者
