問題程式碼程式碼

ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.0.19' (111) 
ERROR 2003 (HY000): Can't connect to MySQL server on '192.168.0.19' (111) 這個 原因就是Mysql資料庫的預設配置檔案my.cnf（linux下）中的bind-address預設為127.0.0.1，所以就算你建立了可以 remote訪問的使用者，你也不能使用mysql -h命令進行訪問，若訪問就會出現上出問題，因為此時Mysql只接受localhost，所以需要把bind-address遮蔽掉。 
my.cnf一般在/etc/mysql下面，如果不在使用locate my.cnf查詢，修改前的my.cnf配置檔案為： 
修改前的my.cnf配置檔案程式碼 
# 
# Instead of skip-networking the default is now to listen only on 
# localhost which is more compatible and is not less secure. 
bind-address = 127.0.0.1 
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
我們需要做的就是遮蔽這個bind-address程式碼，遮蔽後代碼為： 
遮蔽後my.cnf配置檔案程式碼 
# 
# Instead of skip-networking the default is now to listen only on 
# localhost which is more compatible and is not less secure. 
#bind-address = 127.0.0.1 
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address = 127.0.0.1
現在你就可以用mysql -h命令進行你想做的操作了，如登入系統： 
登陸

如果上面還不能解決可能是防火強的問題了

1.mysql 錯誤 ERROR 2003 (HY000): Can't connect to MySQL server on 'localhost'
    

解決辦法：關閉防火牆，安陽電腦網，linux下命令

[[email protected] bin]# chkconfig --list | grep -i iptables  ====check fire wall

iptables        0:off   1:off   2:on    3:on    4:on    5:on    6:off

[[email protected] bin]# /sbin/service iptables stop           ====stop fire wall

Flushing firewall rules: [  OK  ]

Setting chains to policy ACCEPT: nat filter [  OK  ]

Unloading iptables modules: [  OK  ]

2.報錯:1130-host ... is not allowed to connect to this MySql server

解決辦法：

授權形式

比如賬戶為root,密碼為root

use mysql;

用root賬戶從任何主機上訪問mysql資料庫了

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;

如果你想允許使用者zz從ip為192.168.1.3的主機連線到mysql伺服器，並使用123456作為密碼

GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.1.3' IDENTIFIED BY '123456' WITH GRANT OPTION;