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This article mainly introduces the example analysis of uninstalling and installing MySQL in Linux CentOS 6.5. it has a certain reference value, and interested friends can refer to it. I hope you can learn a lot after reading this article.

Uninstall the system with MySQL

1. Check to see if the system currently has MySQL installed

Rpm-qa | grep-I mysql

two。 Uninstall the current version of MySQL

Yum remove mysql mysql-server mysql-libs mysql-server

There is a choice during the uninstall process, just "y" is fine.

Check again that no message indicates that it has been uninstalled

3. Find the residual file and delete it

Find /-name mysql

4. Create user groups / users, data directories and their user directories for mysql

Userdel mysql # Delete user groupdel mysql # Delete the default installation path of the user group name mkdir / usr/local/mysql # mysql. It is recommended not to change it. If you need to update the configuration mkdir / usr/local/mysql/data # create a folder under the mysql folder data groupadd mysql # create a user group named mysql useradd-r-g mysql mysql # create users under the user group

5. Extract and transfer the MySQL file

# tar-xzvf mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz # extract the file # cd mysql-5.7.17-linux-glibc2.5-x86_64 # enter the # mv * / usr/local/mysql/ # mobile file

6. Enter the mysql directory to change permissions

Cd mysql/chown-R mysql:mysql. /

7. Execute the installation script

. / scripts/mysql_install_db-- user=mysql

8. After installation, change the current directory owner to root user, and change the data directory owner to mysql

Chown-R root:root. / chown-R mysql:mysql data

9. Start MySQL

. / support-files/mysql.server start

Started successfully

If MySQL starts to report an error, the MySQL process may already exist. Just kill it.

10. Change the mysql password

# after MySQL starts, execute the following command to change the password:. / bin/mysqladmin-u root-h localhost.localdomain password 'root'

11. Log in to MySQL

# after password change, you can log in to MySQL./bin/mysql-h227.0.0.1-uroot-proot. Thank you for reading this article carefully. I hope the article "sample Analysis of uninstalling and installing MySQL in Linux CentOS 6.5" shared by the editor will be helpful to you. At the same time, I also hope that you will support and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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