Linux平臺卸載MySQL

RPM包安裝方式的MySQL卸載

1：檢查是否安裝了MySQL組件。

[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

如上所示，說明安裝了MySQL 5.6.23這個版本的client、server、devel三個組件。

2：卸載前關閉MySQL服務

2.1 方法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 方法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. 收集MySQL對應的文件夾信息

[root@DB-Server init.d]# whereis mysql

mysql: /usr/bin/mysql /usr/include/mysql /usr/share/mysql /usr/share/man/man1/mysql.1.gz

最好實用find命令查看MySQL數據庫相關的文件，方便後面徹底刪除MySQL。

[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：卸載刪除MySQL各類組件

[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：刪除MySQL對應的文件夾

檢查各個MySQL文件夾是否清理刪除乾淨。

[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：刪除mysql用戶及用戶組

如果有必要，刪除mysql用戶以及mysql用戶組。

[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：確認MySQL是否卸載刪除

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

刪除中報錯

[dianyi@localhost ~]$ rpm -qa|grep mysql
mysql-libs-5.1.52-1.el6_0.1.x86_64
[dianyi@localhost ~]$ rpm -e mysql-libs-5.1.52-1.el6_0.1.x86_64
error: Failed dependencies:
        libmysqlclient.so.16()(64bit) is needed by (installed) postfix-2:2.6.6-2.2.el6_1.x86_64
        libmysqlclient.so.16(libmysqlclient_16)(64bit) is needed by (installed) postfix-2:2.6.6-2.2.el6_1.x86_64
        mysql-libs is needed by (installed) postfix-2:2.6.6-2.2.el6_1.x86_64
[dianyi@localhost ~]$ rpm -e postfix-2:2.6.6-2.2.el6_1.x86_64
error: package postfix-2:2.6.6-2.2.el6_1.x86_64 is not installed

解決辦法：

rpm -e --nodeps mysql-libs-5.1.52-1.el6_0.1.x86_64

二進制包/源碼安裝方式的MySQL卸載

如果是採用二進制包安裝的MySQL，那麼你用下面命令是找不到任何MySQL組件的。所以如果你不知道MySQL的安裝方式，千萬不要用下面命令來判別是否安裝了MySQL

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

1：檢查MySQL服務並關閉服務進程。

首先通過進程查看是否有MySQL的服務的狀態, 如下所示，MySQL服務是啓動的。

[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]# 

2：查找MySQL的安裝目錄並徹底刪除

[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：刪除一些配置文件

配置文件一般有/etc/my.cnf 或/etc/init.d/mysql.server，視具體安裝配置情況而定。

4：刪除MySQL用戶以及用戶組

[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

參考文章：

1.https://www.cnblogs.com/kerrycode/p/4364465.html

2.http://blog.csdn.net/frinder/article/details/8165748

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