There are no enabled repositories in "/etc/yum.repos.d", "/etc/yum/repos.d"
(centos)yum报错：There are no enabled repos问题原因及解决
解决方法：
vi /etc/yum.repos.d/base.repo
然后添加如下信息：
#generic-repos is licensed under the Mulan PSL v2.
#You can use this software according to the terms and conditions of the Mulan PSL v2.
#You may obtain a copy of Mulan PSL v2 at:
# http://license.coscl.org.cn/MulanPSL2
#THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
#PURPOSE.
#See the Mulan PSL v2 for more details.
[OS]
name=OS
baseurl=http://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/RPM-GPG-KEY-openEuler
[everything]
name=everything
baseurl=http://repo.openeuler.org/openEuler-20.03-LTS/everything/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-20.03-LTS/everything/$basearch/RPM-GPG-KEY-openEuler
[EPOL]
name=EPOL
baseurl=http://repo.openeuler.org/openEuler-20.03-LTS/EPOL/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/RPM-GPG-KEY-openEuler
[debuginfo]
name=debuginfo
baseurl=http://repo.openeuler.org/openEuler-20.03-LTS/debuginfo/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-20.03-LTS/debuginfo/$basearch/RPM-GPG-KEY-openEuler
[source]
name=source
baseurl=http://repo.openeuler.org/openEuler-20.03-LTS/source/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-20.03-LTS/source/RPM-GPG-KEY-openEuler
[update]
name=update
baseurl=http://repo.openeuler.org/openEuler-20.03-LTS/update/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/RPM-GPG-KEY-openEuler
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