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Detailed introduction to uninstalling MySQL database under Linux
- 黄舟Original
- 2017-06-04 10:00:131201browse
How to uninstall MySQL on the Linux platform? This article mainly introduces the method of uninstalling the MySQL database under Linux, which has certain reference value. Interested friends can refer to
How to uninstall the MySQL database under Linux? The following summarizes and organizes the methods of uninstalling MySQL on the Linux platform. There are three main ways to install MySQL: binary package installation (Using Generic Binaries), RPM package installation, and source code installation. Corresponding to different installation methods, the uninstallation steps are somewhat different. If there are any deficiencies or errors in the article, please point it out or add to it!
MySQL uninstallation using RPM package installation method
1. Check whether the MySQL component is installed.
[root@DB-Server init.d]# rpm -qa | grep -i mysql MySQL-devel-5.6.23-1.linux_glibc2.5 MySQL-client-5.6.23-1.linux_glibc2.5 MySQL-server-5.6.23-1.linux_glibc2.5
As shown above, it means that the three components of client, server and devel of MySQL 5.6.23 version are installed.
2. Close the MySQL service before uninstalling
2.1 Method 1
[root@DB-Server init.d]# service mysql status MySQL running (25673)[ OK ] [root@DB-Server init.d]# service mysql stop Shutting down MySQL..[ OK ] [root@DB-Server init.d]# service mysql status MySQL is not running[FAILED]
2.2 Method 2
[root@DB-Server init.d]# ./mysql status MySQL running (26215)[ OK ] [root@DB-Server init.d]# ./mysql stop Shutting down MySQL..[ OK ] [root@DB-Server init.d]# ./mysql status MySQL is not running[FAILED] [root@DB-Server init.d]#
[root@DB-Server init.d]# chkconfig --list | grep -i mysql mysql 0:off 1:off 2:on 3:on 4:on 5:on 6:off [root@DB-Server init.d]#
3. Collect the folder information corresponding to MySQL
[root@DB-Server init.d]# whereis mysql mysql: /usr/bin/mysql /usr/include/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz
It is best to use the find command to view the files related to the MySQL database for convenience later. CompletelydeleteMySQL.
[root@DB-Server init.d]# find / -name mysql /etc/rc.d/init.d/mysql /etc/logrotate.d/mysql /var/lock/subsys/mysql /var/lib/mysql /var/lib/mysql/mysql /usr/include/mysql /usr/include/mysql/mysql /usr/bin/mysql /usr/share/mysql /usr/lib64/mysql
4. Uninstall and delete various MySQL components
[root@DB-Server init.d]# [root@DB-Server init.d]# rpm -ev MySQL-devel-5.6.23-1.linux_glibc2.5 [root@DB-Server init.d]# rpm -ev MySQL-server-5.6.23-1.linux_glibc2.5 You have new mail in /var/spool/mail/root [root@DB-Server init.d]# rpm -ev MySQL-client-5.6.23-1.linux_glibc2.5 [root@DB-Server init.d]#
5. Delete the files corresponding to MySQL Folder
Check whether each MySQL folder is clean and deleted.
[root@DB-Server init.d]# whereis mysql mysql: [root@DB-Server init.d]# find / -name mysql /var/lib/mysql /var/lib/mysql/mysql /usr/lib64/mysql [root@DB-Server init.d]# rm -rf /var/lib/mysql [root@DB-Server init.d]# rm -rf /var/lib/mysql/mysql [root@DB-Server init.d]# rm -rf /usr/lib64/mysql [root@DB-Server init.d]#
6. Delete the mysql user and user group
If necessary, delete the mysql user and mysql user group.
[root@DB-Server ~]# more /etc/passwd | grep mysql mysql:x:101:501::/home/mysql:/bin/bash [root@DB-Server ~]# more /etc/shadow | grep mysql mysql:!!:16496:::::: [root@DB-Server ~]# more /etc/group | grep mysql mysql:x:501: [root@DB-Server ~]# userdel mysql [root@DB-Server ~]# groupdel mysql groupdel: group mysql does not exist [root@DB-Server ~]#
7. Confirm whether MySQL is uninstalled and deleted
[root@DB-Server init.d]# rpm -qa | grep -i mysql
Uninstall MySQL using binary package/source code installation method
If MySQL is installed using binary package , then you will not be able to find any MySQL components using the following command. So if you don’t know how to install MySQL, never use the following command to determine whether MySQL is installed
[root@DB-Server init.d]# rpm -qa | grep -i mysql
1. Check the MySQL service and close the service process.
First check whether there is a status of the MySQL service through the process. As shown below, the MySQL service is started.
[root@DB-Server init.d]# ps -ef | grep mysql root 4752 4302 0 22:55 pts/1 00:00:00 more /etc/init.d/mysql.server root 7176 1 0 23:23 pts/1 00:00:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --datadir=/usr/local/mysql/data --pid-file=/usr/local/mysql/data/DB-Server.localdomain.pid mysql 7269 7176 15 23:23 pts/1 00:00:01 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/usr/local/mysql/data/DB-Server.localdomain.err --pid-file=/usr/local/mysql/data/DB-Server.localdomain.pid root 7321 4302 0 23:23 pts/1 00:00:00 grep mysql [root@DB-Server init.d]# /etc/init.d/mysql.server status MySQL running (7269)[ OK ] [root@DB-Server init.d]# /etc/init.d/mysql.server stop Shutting down MySQL..[ OK ] [root@DB-Server init.d]# /etc/init.d/mysql.server status MySQL is not running[FAILED] [root@DB-Server init.d]#
[root@DB-Server init.d]# whereis mysql mysql: /usr/local/mysql [root@DB-Server init.d]# find / -name mysql /var/spool/mail/mysql /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/include/mysql /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/bin/mysql /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/data/mysql /usr/local/mysql
[root@DB-Server init.d]# rm -rf /usr/local/mysql-5.7.5-m15-linux-glibc2.5-x86_64/ [root@DB-Server init.d]# rm -rf /usr/local/ [root@DB-Server init.d]# rm -rf /var/spool/mail/mysql [root@DB-Server init.d]#3. Delete some
Configuration fileThe configuration file is generally /etc/my.cnf or /etc/init.d/mysql.server, depending on the specific installation configuration.
4. Delete MySQL users and user groups[root@DB-Server ~]# id mysql uid=101(mysql) gid=501(mysql) groups=501(mysql) context=root:system_r:unconfined_t:SystemLow-SystemHigh [root@DB-Server ~]# userdel mysqlReference materials:
Detailed explanation of completely uninstalling mysql under Linux
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