我在源码编译安装mysql后，虽然mysql服务可以正常启动，但是当我直接执行mysql后，出现了错误。
错误提示如下：
[root@server98 ~]# mysql
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
出现错误原因：
由于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。
[root@server98 ~]# find / -name mysql.sock
/usr/local/mysql/data/mysql.sock
解决方法如下：
1.直接指定mysql通道
[root@server98 ~]# mysql --socket=/usr/local/mysql/data/mysql.sock
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 4
Server version: 5.6.10 Source distribution
Copyright (c) 2000, 2013, 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>
2.创建符号链接（软链接）
为mysql.sock增加软链接（相当与Windows下的快捷方式）
[root@server98 tmp]#ln -s /usr/local/mysql/data/mysql.sock /tmp/mysql.sock
[root@server98 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 5
Server version: 5.6.10 Source distribution
Copyright (c) 2000, 2013, 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>