[root@ken yum.repos.d]# cat /etc/yum.repos.d/net.repo
[root@ken yum.repos.d]# yum install cobbler dhcp tftp-server xinetd syslinux httpd -y
Loaded plugins: fastestmirror
Determining fastest mirrors
centos | 3.6 kB 00:00:00
https://mirrors.aliyun.com/epel/7/x86_64/repodata/repomd.xml: [Errno 14] curl#60 – “Peer’s Certificate has expired.”
Trying other mirror.
It was impossible to connect to the CentOS servers.
This could mean a connectivity issue in your environment, such as the requirement to configure a proxy,
or a transparent proxy that tampers with TLS security, or an incorrect system clock.
You can try to solve this issue by using the instructions on https://wiki.centos.org/yum-errors
If above article doesn’t help to resolve this issue please use https://bugs.centos.org/.
One of the configured repositories failed (epel),
and yum doesn’t have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work “fix” this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum –disablerepo=epel …
4. Disable the repository permanently, so yum won’t use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use –enablerepo for temporary usage:
yum-config-manager –disable epel
subscription-manager repos –disable=epel
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
yum-config-manager –save –setopt=epel.skip_if_unavailable=true
failure: repodata/repomd.xml from epel: [Errno 256] No more mirrors to try.
https://mirrors.aliyun.com/epel/7/x86_64/repodata/repomd.xml: [Errno 14] curl#60 – “Peer’s Certificate has expired.” #提示证书过期
一、首先使用yum clena all清空了缓存，但是发现下载依然是同样的报错，
[root@ken yum.repos.d]# ntpdate time1.aliyun.com
再次下次就成功了，所以 [Errno 14] curl#60 – “Peer’s Certificate has expired.”这种问题就是出在了当前系统时间不对导致的！