centos yum更新失败
bash-4.2# sudo yum makecache Loaded plugins: fastestmirror, ovl Determining fastest mirrors
base: mirrors.aliyun.com extras: mirrors.aliyun.com updates: mirrors.aliyun.com base | 3.6 kB 00:00 extras | 2.9 kB 00:00 https://dl.bintray.com/tigervnc/stable/el7/RPMS/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: dl.bintray.com; Unknown error" Trying other mirror. One of the configured repositories failed (TigerVNC-el7), 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:
applescript Copy
Contact the upstream for the repository and get them to fix the problem.
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).
Run the command with the repository temporarily disabled yum --disablerepo=tigervnc-el7 ...
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 tigervnc-el7
or subscription-manager repos --disable=tigervnc-el7
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 compromise:
yum-config-manager --save --setopt=tigervnc-el7.skip_if_unavailable=true
failure: repodata/repomd.xml from tigervnc-el7: [Errno 256] No more mirrors to try. https://dl.bintray.com/tigervnc/stable/el7/RPMS/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: dl.bintray.com; Unknown error"
在用centos的时候，更换yum源，在创建新缓存的时候报错。
这里直接禁用tigervnc-el7即可`yum-config-manager --disable tigervnc-el7`之后重新创建即可2
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