mysql access deined
ÎÒµÄϵͳÊÇubuntu6.06£¬×î½üÐÂ×°ºÃµÄmysqlÔÚ½øÈëmysql¹¤¾ßʱ£¬×ÜÊÇÓдíÎóÌáʾ:
# mysql -uroot -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
ʹÓÃÍøÉϽéÉܵķ½·¨ÐÞ¸ÄrootÓû§µÄÃÜÂ룺
# mysqladmin -uroot -p password 'newpassword'
Enter password:
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: YES)'
ÏÖÔÚÖÕÓÚ±»ÎÒÕÒµ½Á˽â¾ö·½·¨£¬ÈçÏ£¨ÇëÏȲâÊÔ·½·¨Èý£¬Ð»Ð»£¡£©£º
·½·¨Ò»£º
# /etc/init.d/mysql stop
# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
# mysql -u root mysql
mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';
mysql> FLUSH PRIVILEGES;
mysql> quit
# /etc/init.d/mysql restart
# mysql -uroot -p
Enter password: <ÊäÈëÐÂÉèµÄÃÜÂënewpassword>
mysql>
·½·¨¶þ£º
Ö±½ÓʹÓÃ/etc/mysql/debian.cnfÎļþÖÐ[client]½ÚÌṩµÄÓû§ÃûºÍÃÜÂë:
# mysql -udebian-sys-maint -p
Enter password: <ÊäÈë[client]½ÚµÄÃÜÂë>
mysql> UPDATE user SET Password=PASSWORD('newpassword') where USER='root';
mysql> FLUSH PRIVILEGES;
mysql> quit
# mysql -uroot -p
Enter password: <ÊäÈëÐÂÉèµÄÃÜÂënewpassword>
mysql>
·½·¨Èý£º
ÕâÖÖ·½·¨ÎÒûÓнøÐйý²âÊÔ£¬ÒòΪÎÒµÄrootÓû§Ä¬ÈÏÃÜÂëÒѾ±»ÎÒÐ޸ĹýÁË£¬ÄÇλÓпղâÊÔһϣ¬°Ñ½á¹û¸æËßÎÒ£¬Ð»Ð»£¡£¡
# mysql -uroot -p
Enter password: <ÊäÈë/etc/mysql/debian.cnfÎļþÖÐ[client]½ÚÌṩµÄÃÜÂë>
ÖÁ´Ë£¬À§»ó¶àʱµÄÎÊÌâ½â¾öÁË£¡
Ïà¹ØÎĵµ£º
MySQL±¾ÉíûÓÐÌṩreplication failoverµÄ½â¾ö·½°¸(¼ûHow can I use replication to provide redundancy or high availability?)
ÈçºÎʹReplication·½°¸¾ßÓÐHA£¿
´ð°¸ÊÇMMM(MySQL Master-Master Replication Manager)
MMM¶ÔMySQL Master-Slave Replication¾ø¶ÔÊÇÒ»¸öºÜÓÐÒæµÄ²¹³ä!
ÒýÑÔ
Master-SlaveµÄÊý¾Ý¿â»ú¹¹ ......
DATE_FORMAT(date,format)
¸ù¾Ýformat×Ö·û´®¸ñʽ»¯dateÖµ¡£ÏÂÁÐÐÞÊηû¿ÉÒÔ±»ÓÃÔÚformat×Ö·û´®ÖУº %M ÔÂÃû×Ö(January……December)
%W
ÐÇÆÚÃû×Ö(Sunday……Saturday)
%D ÓÐÓ¢Óïǰ׺µÄÔ·ݵÄÈÕÆÚ(1st, 2nd, 3rd, µÈµÈ¡££©
%Y Äê, Êý×Ö, 4 λ
%y Äê, Êý×Ö, 2 λ
%a ËõдµÄÐÇÆÚÃû×Ö(Sun ......
MysqlÔÚÔËÐÐÒ»¶Îʱ¼äºó£¬Ëæ×Å¿âÈÝÁ¿µÄÔö´ó£¬±íµÄÔö¶à£¬ÓеÄʱºòÒòΪµôµç»òÕ߯äËûÔÒòµ¼ÖÂÊý¾Ý¿âËð»µ,±ÈÈ磺 ¼ì²éÓÅ»¯²¢ÐÞ¸´ËùÓеÄÊý¾Ý¿â£¬ÎÒÃÇ¿ÉÒÔʹÓÃmysql×Ô´øµÄmysqlcheckÃüÁîÀ´¿ìËÙÐÞ¸´ËùÓеÄÊý¾Ý¿â»òÕßÌØ¶¨µÄÊý¾Ý¿â; ½øÈëMysqlµÄBinĿ¼£ºd:\MySQL\MySQL Server 4.1\bin or /usr/bin/
(ls my* ÏÔʾmy¿ªÍ·µÄÎļþ£© ......
½ü¶Îʱ¼äͻȻ¶ÔMYSQLÕâ¸ö¿ªÔ´Êý¾ÝÓÐÁËÐËȤ£¬Ö÷ÒªÊÇÆäÊÇ¿ªÔ´Ãâ·Ñ£¬ÏëÏëÒÔºóÎÞÂÛÊǹ«Ë¾×öÏîÄ¿»¹ÊǸöÈË×öЩ¼òµ¥µÄСϵͳ£¬¶¼¿ÉÒÔÑ¡Ôñ£¬ÓÚÊÇ»¨Á˵ãʱ¼äÑо¿ÁËÏ£¬ÏÖÔÚ·ÖÏíÏÂ×Ô¼ºµÄѧϰÐĵ᣽ñÌì¿´ÁËдÆäϵͳµÄ×é³ÉºÍÕûÌå½á¹¹£¬ÏÖÔÚ°ÑÕûÌåµÄ½á¹¹ÓÃVISIO»ÁËÏ£¬È»ºóÖðÒ»½âÊÍ£¬²¢²ûÊöÏÂÎÒµÄÀí½â£¬Ï±ßÊÇMySQLϵͳ½á¹¹Í¼µ ......
1.µ¼³öÕû¸öÊý¾Ý¿â
¡¡¡¡mysqldump -u Óû§Ãû -p Êý¾Ý¿âÃû > µ¼³öµÄÎļþÃû
¡¡¡¡mysqldump -u wcnc -p smgp_apps_wcnc > wcnc.sql
2.µ¼³öÒ»¸ö±í
¡¡¡¡mysqldump -u Óû§Ãû -p Êý¾Ý¿âÃû ±íÃû> µ¼³öµÄÎļþÃû
¡¡¡¡mysqldump -u wcnc -p smgp_apps_wcnc users> wcnc_users.sql
3.µ¼³öÒ»¸öÊý¾Ý¿â½á¹¹
¡¡¡¡mysqld ......