Mysql找回管理员密码

我们使用MYSQL的时候有可能因为种种原因忘记ROOT密码，如果是那样数据库可能就废掉了，但是今天给大家分享下找回ROOT密码的方法或者说是在不知道root密码的情况下修改ROOT密码，但是还是建议大家对root密码谨慎保管，防止一些不必要的麻烦

找回管理员密码：

[root@localhost~]# service mysqld stop

Shutting down MySQL....[确定]

[root@localhost~]# vim /etc/init.d/mysqld

大约在283行：
      $bindir/mysqld_safe --datadir="$datadir"--pid-file="$mysqld_pid_file_path" $other_args >/dev/null2>&1 &
      wait_for_pid created "$!""$mysqld_pid_file_path"; return_value=$?
更改为
      $bindir/mysqld_safe --skip-grant-tables --skip-networking
--datadir="$datadir"--pid-file="$mysqld_pid_file_path" $other_args >/dev/null2>&1 &
      wait_for_pid created "$!""$mysqld_pid_file_path"; return_value=$?
保存退出
mysql> use mysql
Readingtable information for completion of table and column names
You canturn off this feature to get a quicker startup with -A
 
Databasechanged
mysql> select user,host,password from user;
+---------+-----------------------+-------------------------------------------+
|user    | host                  | password                                  |
+---------+-----------------------+-------------------------------------------+
|root    | localhost             |*4941369BD46398A2BDEEC85411065D7137D4EA0F |
|root    | localhost.localdomain |*4941369BD46398A2BDEEC85411065D7137D4EA0F |
|root    | 127.0.0.1             |*4941369BD46398A2BDEEC85411065D7137D4EA0F |
|tianke  | %                     |*A399693A49F7EC7C548D0FC376FA52AD293A552F |
|tianke1 | %                     |*EEAC51414F1AE247D67F47A875BDB134CF39986C |
+---------+-----------------------+-------------------------------------------+
5 rowsin set (0.01 sec)
修改root密码
mysql> update user setpassword=password('123456')  whereuser='root';
QueryOK, 3 rows affected (0.00 sec)
Rowsmatched: 3  Changed: 3  Warnings: 0
然后将服务再次停掉，然后再将掺数改回重启mysql即可。