How to uninstall mysql in linux?

Steps to uninstall mysql on linux:

1. First check the installation of mysql

rpm -qa|grep -i mysql

Displays the previous installation:

MySQL-client-5.5.25a-1.rhel5
MySQL-server-5.5.25a-1.rhel5

2. Stop the mysql service and delete the package

Delete command: rpm -e –nodeps package name

rpm -ev MySQL-client-5.5.25a-1.rhel5  
rpm -ev MySQL-server-5.5.25a-1.rhel5

If you are prompted with a dependency package error , then use the following command to try

rpm -ev MySQL-client-5.5.25a-1.rhel5 --nodeps

If the error prompt: error: %preun(xxxxxx) scriptlet failed, exit status 1

then use the following command to try:

rpm -e --noscripts MySQL-client-5.5.25a-1.rhel5

3. Find the directory of the old version of mysql, and delete the files and libraries of the old version of mysql

Search directory

find / -name mysql

The search results are as follows:

/var/lib/mysql
/var/lib/mysql/mysql
/usr/lib64/mysql

Delete the corresponding mysql directory

rm -rf /var/lib/mysql
rm -rf /var/lib/mysql
rm -rf /usr/lib64/mysql

Note: /etc/my.cnf will not be deleted after uninstallation, and needs to be deleted manually

rm -rf /etc/my.cnf

4. Check again whether the machine has mysql installed

rpm -qa|grep -i mysql

No results, indicating that it has been completely uninstalled. Then just install mysql directly.

Related learning recommendations: mysql tutorial(video)

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