无法通过 socket '/var/mysql/mysql.sock' 连接到本地 MySQL 服务器 (38)

I am having a big problem trying to connect to mysql. When I run:

/usr/local/mysql/bin/mysql start

我有以下错误:

Can't connect to local MySQL server through socket '/var/mysql/mysql.sock' (38)

我在 /var/mysql 目录下有 mysql.sock.

在 /etc/my.cnf 我有:

[client]
port=3306
socket=/var/mysql/mysql.sock

[mysqld]
port=3306
socket=/var/mysql/mysql.sock
key_buffer_size=16M
max_allowed_packet=8M

在 /etc/php.ini 我有:

; Default socket name for local MySQL connects.  If empty, uses the built-in
; MySQL defaults.
mysql.default_socket = /var/mysql/mysql.sock

我已经使用 sudo/opt/local/apache2/bin/apachectl restart

但我仍然有错误.

否则，我不知道这是否相关，但是当我执行 mysql_config --sockets 我得到

--socket         [/tmp/mysql.sock]