root@localhost:~# mysql -u root -p  Enter password:  ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)  root@localhost:~# service mysqld restart  Shutting down MySQL..                   [ OK ]  Starting MySQL.                      [ OK ]  root@localhost:~# mysql -u root -p  Enter password:  ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

 root@localhost:~# find / -name mysql.sock /tmp/mysql.sock root@localhost:~# mysql -u root -p -S /tmp/mysql.sock Enter password: Welcome to the MySQL monitor. Commands end with ; or /g. Your MySQL connection id is 1 Server version: 5.6.15-log Source distribution Copyright (c) 2000, 2011, 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>

 root@localhost:~# find / -name mysql.sock /tmp/mysql.sock root@localhost:~# vi /etc/my.cnf[mysqld]datadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sockuser=mysql# Default to using old password format for compatibility with mysql 3.x# clients (those using the mysqlclient10 compatibility package).old_passwords=1# Disabling symbolic-links is recommended to prevent assorted security risks;# to do so, uncomment this line:# symbolic-links=0# 加上下面的這段代碼即可[mysql]socket=/tmp/mysql.sock[mysqld_safe]log-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pidroot@localhost:~# mysql -u root -pEnter password:Welcome to the MySQL monitor. Commands end with ; or /g.Your MySQL connection id is 3Server version: 5.6.15-log Source distributionCopyright (c) 2000, 2011, 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>