search
HomeDatabaseMysql Tutorial点滴记录Linux Mysql数据库误删root用户

点滴记录Linux Mysql数据库误删root用户

Jun 07, 2016 pm 03:27 PM
linuxmysqlrootdatabaseRecordMistakenly deleted

http://blog.csdn.net/cywosp/article/details/42145779 在Linux中有时安装Mysql会出现没有root用户的状况,或者说root账户被从mysql.user表中误删除,这样就导致很多权限无法控制。解决办法是重新创建root用户,并授予所有权限,具体方法如下: 1. 修改/etc

http://blog.csdn.net/cywosp/article/details/42145779


   在Linux中有时安装Mysql会出现没有root用户的状况,或者说root账户被从mysql.user表中误删除,这样就导致很多权限无法控制。解决办法是重新创建root用户,并授予所有权限,具体方法如下:

1. 修改/etc/my.conf文件,添加skip-grant-tables

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

skip-grant-tables


[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
2. 重启mysql服务
/etc/init.d/mysqld restart
3. 使用下列命令登陆mysql,无需密码
mysql
4. 登陆后,重新添加root用户
use mysql;
insert into user set user='root',ssl_cipher='',x509_issuer='',x509_subject='';
update user set Host='localhost',select_priv='y', insert_priv='y',update_priv='y', Alter_priv='y',delete_priv='y',create_priv='y',drop_priv='y',reload_priv='y',shutdown_priv='y',Process_priv='y',file_priv='y',grant_priv='y',References_priv='y',index_priv='y',create_user_priv='y',show_db_priv='y',super_priv='y',create_tmp_table_priv='y',Lock_tables_priv='y',execute_priv='y',repl_slave_priv='y',repl_client_priv='y',create_view_priv='y',show_view_priv='y',create_routine_priv='y',alter_routine_priv='y',create_user_priv='y' where user='root';
先退出:quit;
5. 使用下列命令重新登陆, 设置root的密码
mysql -u root
update mysql.user set password=password('yourrootpasswd') where user='root';
update user set host = '%' where user = 'root'; #设置远程机器可访问mysql,如果不需要可不是设置
flush privileges;
quit;
6. 修改/etc/my.conf文件,将skip-grant-tables去掉,然后重启mysql
/etc/init.d/mysqld restart
7. 正常则一切OK


参考:
[1]. http://jingyan.baidu.com/article/7c6fb4287c613880642c9003.html




Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
BLOB Data Type in MySQL: A Detailed Overview for DevelopersBLOB Data Type in MySQL: A Detailed Overview for DevelopersMay 07, 2025 pm 05:41 PM

BlobdatatypesinmysqlareusedforvoringLargebinarydatalikeImagesoraudio.1) Useblobtypes (tinyblobtolongblob) Basedondatasizeneeds. 2) Storeblobsin Perplate Petooptimize Performance.3) ConsidersxterNal Storage Forel Blob Romana DatabasesizerIndimprovebackupupe

How to Add Users to MySQL from the Command LineHow to Add Users to MySQL from the Command LineMay 07, 2025 pm 05:01 PM

ToadduserstoMySQLfromthecommandline,loginasroot,thenuseCREATEUSER'username'@'host'IDENTIFIEDBY'password';tocreateanewuser.GrantpermissionswithGRANTALLPRIVILEGESONdatabase.*TO'username'@'host';anduseFLUSHPRIVILEGES;toapplychanges.Alwaysusestrongpasswo

What Are the Different String Data Types in MySQL? A Detailed OverviewWhat Are the Different String Data Types in MySQL? A Detailed OverviewMay 07, 2025 pm 03:33 PM

MySQLofferseightstringdatatypes:CHAR,VARCHAR,BINARY,VARBINARY,BLOB,TEXT,ENUM,andSET.1)CHARisfixed-length,idealforconsistentdatalikecountrycodes.2)VARCHARisvariable-length,efficientforvaryingdatalikenames.3)BINARYandVARBINARYstorebinarydata,similartoC

The Ultimate Guide to Adding Users in MySQLThe Ultimate Guide to Adding Users in MySQLMay 07, 2025 pm 03:29 PM

ToaddauserinMySQL,usetheCREATEUSERstatement.1)UseCREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password';tocreateauser.2)Enforcestrongpasswordpolicieswithvalidate_passwordpluginsettings.3)GrantspecificprivilegesusingGRANTstatement.4)Forremoteaccess,use

What are stored procedures in MySQL?What are stored procedures in MySQL?May 01, 2025 am 12:27 AM

Stored procedures are precompiled SQL statements in MySQL for improving performance and simplifying complex operations. 1. Improve performance: After the first compilation, subsequent calls do not need to be recompiled. 2. Improve security: Restrict data table access through permission control. 3. Simplify complex operations: combine multiple SQL statements to simplify application layer logic.

How does query caching work in MySQL?How does query caching work in MySQL?May 01, 2025 am 12:26 AM

The working principle of MySQL query cache is to store the results of SELECT query, and when the same query is executed again, the cached results are directly returned. 1) Query cache improves database reading performance and finds cached results through hash values. 2) Simple configuration, set query_cache_type and query_cache_size in MySQL configuration file. 3) Use the SQL_NO_CACHE keyword to disable the cache of specific queries. 4) In high-frequency update environments, query cache may cause performance bottlenecks and needs to be optimized for use through monitoring and adjustment of parameters.

What are the advantages of using MySQL over other relational databases?What are the advantages of using MySQL over other relational databases?May 01, 2025 am 12:18 AM

The reasons why MySQL is widely used in various projects include: 1. High performance and scalability, supporting multiple storage engines; 2. Easy to use and maintain, simple configuration and rich tools; 3. Rich ecosystem, attracting a large number of community and third-party tool support; 4. Cross-platform support, suitable for multiple operating systems.

How do you handle database upgrades in MySQL?How do you handle database upgrades in MySQL?Apr 30, 2025 am 12:28 AM

The steps for upgrading MySQL database include: 1. Backup the database, 2. Stop the current MySQL service, 3. Install the new version of MySQL, 4. Start the new version of MySQL service, 5. Recover the database. Compatibility issues are required during the upgrade process, and advanced tools such as PerconaToolkit can be used for testing and optimization.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment