MYsql 数据库密码忘记(Linux)
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,
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_password
port =
socket = /tmp/mysql.sock # Here follows entries for some specific programs # The MySQL server
[mysqld]
port =
socket = /tmp/mysql.sock
skip-external-locking
log-error=/alidata/log/mysql/error.log
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache =
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
skip-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 replication
log-bin=mysql-bin # binary logging format - mixed recommended
binlog_format=mixed # required unique id between and ^ -
# defaults to if master-host is not set
# but will not function as a master if omitted
server-id = # Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# ) Use the CHANGE MASTER TO command (fully described in our manual) -
# the syntax is:
#
# CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
# where you replace <host>, <user>, <password> by quoted strings and
# <port> by the master's port number (3306 by default).
#
# Example:
#
# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=,
# MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# ) 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 and ^ -
# (and different from the master)
# defaults to if master-host is set
# but will not function as a slave if omitted
#server-id =
#
# The replication master for this slave - required
#master-host = <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user = <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password = <password>
#
# The port the master is listening on.
# optional - defaults to
#master-port = <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 - %
# 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 % of buffer pool size
#innodb_log_file_size = 5M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit =
#innodb_lock_wait_timeout = [mysqldump]
quick
max_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 = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M [mysqlhotcopy]
interactive-timeout
my.cnf
(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;
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