Bit record--linux MySQL database mistakenly delete root user

Reprint please indicate source: http://blog.csdn.net/cywosp/article/details/42145779

In Linux sometimes installing MySQL will appear without root user condition, or the root account is deleted from the Mysql.user table mistakenly, so that many permissions can not be controlled. The workaround is to recreate the root user and grant all permissions, as follows:

1. Modify the/etc/my.conf file to add 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. Restart the MySQL service

/etc/init.d/mysqld restart

3. Use the following command to log in to MySQL without a password

MySQL

4. Re-add the root user after login

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 ';

quit first: quit;

5. Use the following command to log in again to set the root password

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, if you don't need to set
Flush privileges;
Quit

6. Modify the/etc/my.conf file, remove the skip-grant-tables, and restart MySQL

/etc/init.d/mysqld Restart

7. Normal everything OK

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

Bit record--linux MySQL database mistakenly delete root user