Liunx中ERROR 2002 (HY000) Can't connect to local MySQL server through socket 'varlibmysqlmysql.sock' (2)报错

问题：

[root@localhost mysql]# mysql -uroot -p

Enter password:

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

 

原因：mysql未找到mysql.sock 文件

解决方法：

1.检查my.cnf

vim /etc/my.cnf

　　

2.my.cnf文件

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html

[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

　　

3.查看mysql是否启动

/etc/rc.d/init.d/mysqld status

看mysqld是否停止

如果mysqld停止了就使用命令：

/etc/rc.d/init.d/mysqld start

例如：

[root@localhost ~]# /etc/rc.d/init.d/mysqld start
/usr/bin/mysqld_safe: line 517: cd: /root: Not a directory
Starting mysqld:  [  OK  ]
[root@localhost ~]# 

　　

4.再次输入mysql -u root -p    和密码

[root@localhost ~]# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.25 MySQL Community Server (GPL)

Copyright (c) 2000, 2019, 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> 

　

这就解决了