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ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
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    $mysql --help
    ¸ù¾Ý°ïÖú¿ÉÒÔ¿´µ½£¬mysqlĬÈÏʹÓÃsocketÎļþ/var/run/mysqld/mysqld.sockÎļþ£¬¶Ë¿Ú3306À´Á¬½Ómysql·þÎñÆ÷¡£ËùÒÔÎÒÃÇ¿ÉÒÔÐÞ¸ÄĬÈÏÁ¬½Ó²ÎÊýÀ´ÊÔÒ»ÊÔ¡£
    $mysql --socket=/tmp/mysql.sock
ÄÇô£¬ÔõÑùÖªµÀÐèÒª°ÑsocketÐÞ¸ÄΪ/tmp/mysql.sockÄØ£¿
ÎÒÊǸù¾Ý²é¿´mysql½ø³ÌµÃµ½µÄÏûÏ¢£¬Ê¹ÓÃÈçÏÂÃüÁ
    $ps aux|grep mysql
    ¿ÉÒÔ¿´µ½Æô¶¯µÄmysql½ø³ÌʹÓÃÁ˲ÎÊý--socket=/tmp/mysql.sock --port=3306¡£ËùÒÔʹÓÃÃüÁ
    $mysql --socket=/tmp/mysql.sockºó¾ÍÄܹ»³É¹¦Á¬½ÓÉÏmysql·þÎñÆ÷ÁË¡£
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    ¸ù¾ÝÃüÁî
    $mysql --help
    µÄÊä³ö½á¹û¿ÉÒÔ¿´µ½£¬mysql»á°´Ë³Ðò¶ÁÈ¡ÅäÖÃÎļþ/etc/my.conf,/etc/mysql/my.conf,/usr/etc/my.con,~/.my.conf
    ÔÚ/etc/my.confÖпÉÒÔ¿´µ½
[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
socket = /tmp/mysql.sock
Õâ¾ÍÊÇΪʲômysql·þÎñÆ÷Æô¶¯ºóʹÓõÄsocketÊÇ/tmp/mysql.sock
    ÔÚ/etc/mysql/my.confÖпÉÒÔ¿´µ½
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
[mysqld_saft]
socket = /var/run/mysqld/mysqld.sock
[mysqld]
port = 3306
socket = /var/run/mysqld/mysqld.sock
ÕâÑù£¬Á½¸öÎļþÉèÖö¼Æ¥Å䣬µ¼ÖÂ/etc/mysql/my.confÖеÄ[client]¸²¸ÇÁË/etc/my.confÖеÄ[client]ÉèÖã¬ËùÒÔÁ¬½Ó²»ÕýÈ·¡£×î¼òµ¥µÄ°ì·¨ÊÇɾ³ýÕâ¸öÎļþ
    $sudo mv /etc/mysql/my.conf /etc/mysql/mysql.conf_backup
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