Unmount the MySQL database in Linux and the linuxmysql Database

Unmount the MySQL database in Linux and the linuxmysql Database

In Linux, how does one uninstall the MySQL database? The following describes how to uninstall MySQL on Linux. There are three main ways to install MySQL: Binary Package installation (Using Generic Binaries), RPM package installation, and source code installation. The steps for uninstallation vary depending on different installation methods. If there are any deficiencies or errors in this article, please point out or supplement them!

Uninstall MySQL with RPM package installation method

1. Check whether the MySQL component is installed.

[root@DB-Server init.d]# rpm -qa | grep -i mysqlMySQL-devel-5.6.23-1.linux_glibc2.5MySQL-client-5.6.23-1.linux_glibc2.5 MySQL-server-5.6.23-1.linux_glibc2.5

As shown above, the client, server, and devel components of MySQL 5.6.23 are installed.

2. Disable the MySQL service before uninstalling it.

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 mysqlmysql 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/man/man1/mysql.1.gz

It is best to use the find command to view MySQL database-related files, so that MySQL can be permanently deleted later.

[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_glibc2.5You 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 folder corresponding to MySQL.

Check whether the MySQL folders are cleaned and deleted.

[root@DB-Server init.d]# whereis mysqlmysql:[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 mysql users and user groups

If necessary, delete mysql users and mysql user groups.

[root@DB-Server ~]# more /etc/passwd | grep mysqlmysql:x:101:501::/home/mysql:/bin/bash[root@DB-Server ~]# more /etc/shadow | grep mysqlmysql:!!:16496::::::[root@DB-Server ~]# more /etc/group | grep mysqlmysql:x:501:[root@DB-Server ~]# userdel mysql[root@DB-Server ~]# groupdel mysqlgroupdel: group mysql does not exist[root@DB-Server ~]# 

7. Check whether MySQL uninstalls and deletes the instance.

[root@DB-Server init.d]# rpm -qa | grep -i mysql

Uninstalling MySQL in Binary Package/source code installation mode

If MySQL is installed using a binary package, you cannot find any MySQL component using the following command. If you do not know how to install MySQL, do not 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 disable the service process.

First, check whether the MySQL service status exists through the process. As shown in the following figure, the MySQL service is started.

[root@DB-Server init.d]# ps -ef | grep mysqlroot   4752 4302 0 22:55 pts/1  00:00:00 more /etc/init.d/mysql.serverroot   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.pidmysql   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.pidroot   7321 4302 0 23:23 pts/1  00:00:00 grep mysql[root@DB-Server init.d]# /etc/init.d/mysql.server statusMySQL running (7269)[ OK ][root@DB-Server init.d]# /etc/init.d/mysql.server stopShutting down MySQL..[ OK ][root@DB-Server init.d]# /etc/init.d/mysql.server statusMySQL is not running[FAILED][root@DB-Server init.d]# 

2. Find the MySQL installation directory and delete it permanently.

[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. Some configuration file configuration files are usually/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 mysql 

References: How to thoroughly uninstall mysql in Linux

The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.