在Linux 上面装上了 Mysql 数据库，但是发现密码忘了，悲催，解决方法跟Window系统下一样的， 不管是哪个操作系统处理的思路是相同的，就是首先要把mysql的权限去掉，这样即使忘了密码，不使用密码，照样可以进入，

但是window 和linux 在 屏蔽mysql权限方面稍有不同；这个方法适用于 忘记密码，或是刚开始安装mysql ，还没有密码，需要设置密码的情况；

 网上查了一下使用：mysqladmin -u root -p password 123456可以修改

这是我执行后的错误： 

  'Access denied; you need (at least one of) the SUPER privilege(s) for this operation'

 

 

开始解决；

 进入Linux 操作界面：

1.关闭mysql

# service mysqld stop

2.屏蔽权限

 修改MySQL的登录设置 进入mysql 在linux底下的默认安装路径，找到 my.cnf文件：

# vi /etc/my.cnf

--windows系统是my.ini文件

--在[mysqld]的段中加上一句：skip-grant-tables，如没有[mysqld]字段，可手动添加上

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

skip-name-resolve

skip-grant-tables  （这是我加的）

下面是我的配置文件 其中只是多加了一句 话：skip-grant-tables 

# Example MySQL config file for medium systems.## This is for a system with little memory (32M - 64M) where MySQL plays# an important part, or systems up to 128M where MySQL is used together with# other programs (such as a web server)## MySQL programs look for option files in a set of# locations which depend on the deployment platform.# You can copy this option file to one of those# locations. For information about these locations, see:# http://dev.mysql.com/doc/mysql/en/option-files.html## In this file, you can use all long options that a program supports.# If you want to know which options a program supports, run the program# with the "--help" option.# The following options will be passed to all MySQL clients[client]#password    = your_passwordport        = 3306socket        = /tmp/mysql.sock# Here follows entries for some specific programs# The MySQL server[mysqld]port        = 3306socket        = /tmp/mysql.sockskip-external-lockinglog-error=/alidata/log/mysql/error.logkey_buffer_size = 16Mmax_allowed_packet = 1Mtable_open_cache = 64sort_buffer_size = 512Knet_buffer_length = 8Kread_buffer_size = 256Kread_rnd_buffer_size = 512Kmyisam_sort_buffer_size = 8Mskip-grant-tables# Don't listen on a TCP/IP port at all. This can be a security enhancement,# if all processes that need to connect to mysqld run on the same host.# All interaction with mysqld must be made via Unix sockets or named pipes.# Note that using this option without enabling named pipes on Windows# (via the "enable-named-pipe" option) will render mysqld useless!# #skip-networking# Replication Master Server (default)# binary logging is required for replicationlog-bin=mysql-bin# binary logging format - mixed recommendedbinlog_format=mixed# required unique id between 1 and 2^32 - 1# defaults to 1 if master-host is not set# but will not function as a master if omittedserver-id    = 1# Replication Slave (comment out master section to use this)## To configure this host as a replication slave, you can choose between# two methods :## 1) Use the CHANGE MASTER TO command (fully described in our manual) -#    the syntax is:##    CHANGE MASTER TO MASTER_HOST=
       
        , MASTER_PORT=
        
         ,#    MASTER_USER=
         
          , MASTER_PASSWORD=
          
            ;##    where you replace 
           
            , 
            
             , 
             
               by quoted strings and# 
              
                by the master's port number (3306 by default).## Example:## CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,# MASTER_USER='joe', MASTER_PASSWORD='secret';## OR## 2) Set the variables below. However, in case you choose this method, then# start replication for the first time (even unsuccessfully, for example# if you mistyped the password in master-password and the slave fails to# connect), the slave will create a master.info file, and any later# change in this file to the variables' values below will be ignored and# overridden by the content of the master.info file, unless you shutdown# the slave server, delete master.info and restart the slaver server.# For that reason, you may want to leave the lines below untouched# (commented) and instead use CHANGE MASTER TO (see above)## required unique id between 2 and 2^32 - 1# (and different from the master)# defaults to 2 if master-host is set# but will not function as a slave if omitted#server-id = 2## The replication master for this slave - required#master-host = 
               
                ## The username the slave will use for authentication when connecting# to the master - required#master-user = 
                
                 ## The password the slave will authenticate with when connecting to# the master - required#master-password = 
                 
                  ## The port the master is listening on.# optional - defaults to 3306#master-port = 
                  
                   ## binary logging - not required for slaves, but recommended#log-bin=mysql-bin# Uncomment the following if you are using InnoDB tables#innodb_data_home_dir = /usr/local/mysql/data#innodb_data_file_path = ibdata1:10M:autoextend#innodb_log_group_home_dir = /usr/local/mysql/data# You can set .._buffer_pool_size up to 50 - 80 %# of RAM but beware of setting memory usage too high#innodb_buffer_pool_size = 16M#innodb_additional_mem_pool_size = 2M# Set .._log_file_size to 25 % of buffer pool size#innodb_log_file_size = 5M#innodb_log_buffer_size = 8M#innodb_flush_log_at_trx_commit = 1#innodb_lock_wait_timeout = 50[mysqldump]quickmax_allowed_packet = 16M[mysql]no-auto-rehash# Remove the next comment character if you are not familiar with SQL#safe-updates[myisamchk]key_buffer_size = 20Msort_buffer_size = 20Mread_buffer = 2Mwrite_buffer = 2M[mysqlhotcopy]interactive-timeout
                  
                 
                
               
              
             
            
           
          
         
        
       

 

（3）打开mysql服务

# service mysqld start;

 

(4) 

[root@gc ~]# mysql 

mysql> use mysql; 

mysql> update user set password=password('new_password') where user='root'; 

mysql> flush privileges; 

mysql >exit;

这样就把密码修改了，

（5） 改完了密码之后，需要恢复权限：把之前对/etc/my.cnf的  skip-grant-tables  删掉

然后执行  # service mysqld restart；

(6) 然后mysql -u root -p

Enter Password :你的新密码；

 

就可以了；