问题
代码语言：javascript复制[root@node1 text]# mysql -uroot -p123456
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
[root@node1 text]#停止mysql
代码语言：javascript复制[root@node1 text]# service mysqld stop
Stopping mysqld: [ OK ]
[root@node1 text]#启动安全模式
代码语言：javascript复制[root@node1 text]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 30150
[root@node1 text]# 180413 14:34:50 mysqld_safe Logging to '/var/log/mysqld.log'.
180413 14:34:50 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
[root@node1 text]# 设置root密码，刷新权限
代码语言：javascript复制[root@node1 text]# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.1.73 Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> UPDATE user SET Password=PASSWORD('123456') where USER='root';
Query OK, 3 rows affected (0.00 sec)
Rows matched: 4 Changed: 3 Warnings: 0
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)
mysql> quit
Bye
[root@node1 text]#重启MySQL，再次登录
代码语言：javascript复制[root@node1 text]# service mysqld restart
180413 14:36:01 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
Stopping mysqld: [ OK ]
Starting mysqld: [ OK ]
[1] Done mysqld_safe --user=mysql --skip-grant-tables --skip-networking
[root@node1 text]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.1.73 Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> 
