CentOS6.4 install and use mysql

Recently, I have been developing ecms3000. I have encountered many problems when I want to use databases and install mysql databases on the development server. now I will summarize the issues and take notes for myself. One installation process 1. view the system's own version rpm-qa | grepmysql // terminal returns mysql-5.1.69-1.el6_4.x86_64mysql-server-5.1.69-1.el6_4.x86_64mysql-libs-5.1.69-1.e

Recently, I have been developing ecms 3000. I have encountered many problems when I want to use databases and install mysql databases on the development server. now I will summarize the issues and take notes for myself.

1. installation process

1. view the system version

Rpm-qa | grep mysql // terminal return mysql-5.1.69-1.el6_4.x86_64mysql-server-5.1.69-1.el6_4.x86_64mysql-libs-5.1.69-1.el6_4.x86_64

2. for uniform installation, uninstall the system version first.

Rpm-e -- nodeps mysql-libs-5.1.69-1.el6_4.x86_64 // there may be errors and warnings by using the following command rpm-e -- allmatches -- nodeps mysql-server

3. install mysql

Yum-y install mysql-server // The installation is complete. check the rpm-qi mysql-server version.

4. start and stop, restart command

// Start service mysqld start // stop service mysqld stop // restart service mysqld restart

5. add the boot service

Chkconfig mysqld on // check whether the startup is efficient. chkconfig -- list mysqld // if this happens, mysqld 0: disable 1: disable 2: Enable 3: Enable 4: enable 5: enable 6: disable

6. important settings

// Modify the encoding and support Chinese vi/edc/my. cnf // add a default-character-set = utf8 under [mysqld] // set the database root password mysqladmin-u root password 19810316 // log on to the database mysql-u root-p // allows the root user to remotely log on to mysql> grant all privileges on *. * to root @ "%" identified by "zc1230"; mysql> flush privileges; // view the current encoding mysql> show variables like '% character % '; // enable the firewall to allow Database Access-a input-p tcp-m state -- state NEW-m tcp -- dport 3306-j ACCEPT // restart the firewall service iptables restart

2. if you encounter the following problems, please solve them in this way

2.1 failed to start normally. check the log with the following error:

InnoDB: using the same InnoDB data or log files.
InnoDB: Unable to lock./ibdata1, error: 11
InnoDB: Check that you do not already have another mysqld process

This problem is generally caused by forced power failure on the server. after a trip, it should be solved in this way.

// View the mysql process ps-ef | grep mysql // Two Dead processes kill-9 Process Number // restart normal // method 2, the second directly put mysql. rename the sock file. You can also delete it. we recommend that you change the name to mv/var/lib/mysql. sock/var/lib/mysql. sock. bak // and restart it normally.

2.2 Other questions to be added

III. database client

Here I recommend using MySQL front, which is easy to use and still on the Chinese interface.