Linux完全卸载MySQL（二进制包/源码 安装方式）

测试环境说明:

[root@linuxpg53 ~]# cat /etc/redhat-release 
CentOS Linux release 7.6.1810 (Core)

[root@linuxpg53 ~]# mysql --version
mysql  Ver 14.14 Distrib 5.7.30, for linux-glibc2.12 (x86_64) using  EditLine wrapper

mysql> status
--------------
mysql  Ver 14.14 Distrib 5.7.30, for linux-glibc2.12 (x86_64) using  EditLine wrapper

Connection id:		5
Current database:	
Current user:		root@localhost
SSL:			Not in use
Current pager:		stdout
Using outfile:		''
Using delimiter:	;
Server version:		5.7.30-log MySQL Community Server (GPL)
Protocol version:	10
Connection:		Localhost via UNIX socket
Server characterset:	utf8
Db     characterset:	utf8
Client characterset:	utf8
Conn.  characterset:	utf8
UNIX socket:		/tmp/mysql.sock
Uptime:			2 min 22 sec

Threads: 1  Questions: 5  Slow queries: 0  Opens: 108  Flush tables: 1  Open tables: 101  Queries per second avg: 0.060
--------------

mysql>

检查 MySQL 服务并关闭服务进程

--检查mysql服务
[root@linuxpg53 ~]# ps -ef |grep mysql
mysql     10801      1  0 18:11 ?        00:00:03 /mysql/app/mysql/bin/mysqld --defaults-file=/mysql/data/3306/my.cnf
root      11308  10622  0 18:31 pts/0    00:00:00 grep --color=auto mysql
[root@linuxpg53 ~]# systemctl status mysqld.service 
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
   Active: active (running) since Fri 2023-09-01 18:11:23 CST; 20min ago
     Docs: man:mysqld(5)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
 Main PID: 10801 (mysqld)
    Tasks: 28
   CGroup: /system.slice/mysqld.service
           └─10801 /mysql/app/mysql/bin/mysqld --defaults-file=/mysql/data/3306/my.cnf

Sep 01 18:11:23 linuxpg53 systemd[1]: Started MySQL Server.

--关闭mysql服务
[root@linuxpg53 ~]# systemctl stop mysqld.service 
[root@linuxpg53 ~]# systemctl status mysqld.service 
● mysqld.service - MySQL Server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:mysqld(5)
           http://dev.mysql.com/doc/refman/en/using-systemd.html

Sep 01 18:11:23 linuxpg53 systemd[1]: Started MySQL Server.
Sep 01 18:33:35 linuxpg53 systemd[1]: Stopping MySQL Server...
Sep 01 18:33:37 linuxpg53 systemd[1]: Stopped MySQL Server.
[root@linuxpg53 ~]# ps -ef |grep mysql
root      11343  10622  0 18:33 pts/0    00:00:00 grep --color=auto mysql

查找 MySQL相关目录并彻底删除

--查找：
[root@linuxpg53 mysql]# whereis mysql
mysql: /usr/lib64/mysql /usr/share/mysql /mysql/app/mysql-5.7.30-linux-glibc2.12-x86_64/bin/mysql
[root@linuxpg53 mysql]# which mysql
/mysql/app/mysql/bin/mysql
[root@linuxpg53 mysql]# find  / -name mysql
/etc/selinux/targeted/active/modules/100/mysql
/var/lib/pcp/config/pmlogconf/mysql
/usr/lib64/mysql
/usr/lib64/perl5/vendor_perl/auto/DBD/mysql
/usr/lib64/perl5/vendor_perl/DBD/mysql
/usr/share/mysql
/mysql
/mysql/app/mysql-5.7.30-linux-glibc2.12-x86_64/bin/mysql
/mysql/app/mysql-5.7.30-linux-glibc2.12-x86_64/include/mysql
/mysql/app/mysql-5.7.30-linux-glibc2.12-x86_64/mysql
/mysql/app/mysql
/mysql/data/3306/data/mysql

--删除：
[root@linuxpg53 ~]# rm -rf /etc/selinux/targeted/active/modules/100/mysql
[root@linuxpg53 ~]# rm -rf /var/lib/pcp/config/pmlogconf/mysql
[root@linuxpg53 ~]# rm -rf /usr/lib64/mysql
[root@linuxpg53 ~]# rm -rf /usr/lib64/perl5/vendor_perl/auto/DBD/mysql
[root@linuxpg53 ~]# rm -rf /usr/lib64/perl5/vendor_perl/DBD/mysql
[root@linuxpg53 ~]# rm -rf /usr/share/mysql
[root@linuxpg53 ~]# rm -rf /mysql
[root@linuxpg53 ~]# find / -name mysql

删除其他配置文件

配置文件一般有 /etc/my.cnf 、mysql.sock 等，视具体安装配置情况而定。

rm -rf /etc/my.cnf 
rm -rf /tmp/mysql.sock
...

删除 MySQL 用户以及用户组

[root@linuxpg53 ~]# id mysql
uid=987(mysql) gid=1002(mysql) groups=1002(mysql)
[root@linuxpg53 ~]# userdel -r mysql
userdel: mysql mail spool (/var/spool/mail/mysql) not found
userdel: mysql home directory (/home/mysql) not found

至此Linux完全卸载MySQL（二进制包/源码 安装方式）测试完成。