[root@XXX ~]# mysql -h localhost -uroot -pEnter password:ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql/mysql.sock' (2) [root@XXX ~]# mysql -uroot -p Enter password: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql/mysql.sock' (2)

换成

[root@XXX ~]# mysql -h 127.0.0.1 -uroot -pEnter password:Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 7812Server version: 5.7.18-log Source distributionCopyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>

原因:MySQL设置成了值允许 127.0.0.1 地址访问