centos-linux mysql卸载

卸载mysql组件
【 查看MySQL组件 】
[root@localhost ~]# rpm -qa | grep -i mysql
mysql-server-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql-errmsg-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql-common-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
mysql57-community-release-el7-11.noarch
【删除】
[root@rainbow bin]#  rpm -ev mysql-server-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
Preparing packages...
mysql-server-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
【删除】
[root@rainbow bin]#  rpm -ev mysql-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
Preparing packages...
mysql-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
【删除】
[root@rainbow bin]#  rpm -ev mysql-errmsg-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
Preparing packages...
mysql-errmsg-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
[root@rainbow bin]#  rpm -ev mysql-common-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
Preparing packages...
mysql-common-8.0.17-3.module_el8.0.0+181+899d6349.x86_64
【查看】
[root@rainbow bin]# rpm -qa | grep -i mysql    

删除相关目录
【查看】
[root@rainbow bin]# find / -name mysql
/var/lib/selinux/targeted/active/modules/100/mysql
/var/lib/mysql
/var/lib/mysql/mysql
/var/log/mysql
/usr/share/bash-completion/completions/mysql
/usr/share/selinux/packages/mysql
/usr/share/selinux/targeted/default/active/modules/100/mysql
【删除】
root@rainbow bin]# rm -rf /var/lib/selinux/targeted/active/modules/100/mysql
[root@rainbow bin]# rm -rf /var/lib/mysql
[root@rainbow bin]# rm -rf /var/log/mysql
[root@rainbow bin]# rm -rf /usr/share/bash-completion/completions/mysql
[root@rainbow bin]# rm -rf /usr/share/selinux/packages/mysql
[root@rainbow bin]# rm -rf /usr/share/selinux/targeted/default/active/modules/100/mysql
【再次检查，什么都没有说明卸载成功了】
[root@rainbow bin]# find / -name mysql

 wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

rpm -Uvh mysql57-community-release-el7-11.noarch.rpm 

yum repolist all | grep mysql

mysql-cluster-7.5-community        MySQL Cluster 7.5 Community    disabled
mysql-cluster-7.5-community-source MySQL Cluster 7.5 Community -  disabled
mysql-cluster-7.6-community        MySQL Cluster 7.6 Community    disabled
mysql-cluster-7.6-community-source MySQL Cluster 7.6 Community -  disabled
mysql-connectors-community         MySQL Connectors Community     enabled:   141
mysql-connectors-community-source  MySQL Connectors Community - S disabled
mysql-tools-community              MySQL Tools Community          enabled:   105
mysql-tools-community-source       MySQL Tools Community - Source disabled
mysql-tools-preview                MySQL Tools Preview            disabled
mysql-tools-preview-source         MySQL Tools Preview - Source   disabled
mysql55-community                  MySQL 5.5 Community Server     disabled
mysql55-community-source           MySQL 5.5 Community Server - S disabled
mysql56-community                  MySQL 5.6 Community Server     disabled
mysql56-community-source           MySQL 5.6 Community Server - S disabled
mysql57-community                  MySQL 5.7 Community Server     enabled:   194
mysql57-community-source           MySQL 5.7 Community Server - S disabled
mysql80-community                  MySQL 8.0 Community Server     disabled
mysql80-community-source           MySQL 8.0 Community Server - S disabled

 vi /etc/yum.repos.d/mysql-community.repo   //如果切换版本可以在里面修改

yum install mysql-server

或

yum install -y mysql-community-server