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

本地登陆mysql提示

[root@iZ23un4eyxhZ default]# mysql -i 127.0.0.1
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

解决方法：

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，所以查找到正确的位置：

[root@iZ23un4eyxhZ default]# find / -name "mysql.sock"
/tmp/systemd-private-9b22543919a542fe83203e70d30920d2-vpn.service-vhaYd1/tmp/mysql.sock

方法一：直接指定mysql通道

[root@iZ23un4eyxhZ default]# mysql --socket=/tmp/systemd-private-9b22543919a542fe83203e70d30920d2-vpn.service-vhaYd1/tmp/mysql.sock
Welcome to the MySQL monitor.  Commands end with ; or /g.
Your MySQL connection id is 2 to server version: 5.0.22
Type 'help;' or '/h' for help. Type '/c' to clear the buffer.
mysql>

方法二：创建符号连接：

#为mysql.sock增加软连接（相当于windows中的快捷方式）。
ln -s /tmp/systemd-private-9b22543919a542fe83203e70d30920d2-vpn.service-vhaYd1/tmp/mysql.sock /tmp/mysql.sock

[root@iZ23un4eyxhZ default]# ln -s /tmp/systemd-private-9b22543919a542fe83203e70d30920d2-vpn.service-vhaYd1/tmp/mysql.sock /tmp/mysql.sock
[root@iZ23un4eyxhZ default]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or /g.
Your MySQL connection id is 2 to server version: 5.0.22
Type 'help;' or '/h' for help. Type '/c' to clear the buffer.
mysql>