在使用yum下载ntp时报错：error: there are no enabled repositories in "/etc/yum.repos.d", "/etc/yum/repos.d", "/etc/distro.rep
解决办法：
openEuler虚拟机配置yum源：
1、查看系统内核情况
uname -a
?发现内核是x86_64
2、查看原yum源
cd /etc/yum.repos.d/
cat openEuler_x86_64.rep
3、修改配置：
vi /etc/yum.repos.d/openEuler_x86_64.repo
添加如下配置：
[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/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/RPM-GPG-KEY-openEuler
该yum源来自于码云，链接如下：
openEuler-20.03-LTS/generic.repo
4、更新yum源
yum makecache更新以后，查看 repolist
yum repolist?重新下载ntp
