下面由centos基礎教程欄目給大家介紹centos7 yum fastestmirror不能使用的解決辦法，希望對需要的朋友有所幫助！

centos7 yum fastestmirror不能使用

[root@localhost ~]# yum install lrzsz Loaded plugins: fastestmirror Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

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第一步：

[root@localhost ~]# vi  /etc/yum/pluginconf.d/fastestmirror.conf  [main] enabled=1//把1改為0   verbose=0 always_print_best_host = true socket_timeout=3 #  Relative paths are relative to the cachedir (and so works for users as well # as root). hostfilepath=timedhosts.txt maxhostfileage=10 maxthreads=15 #exclude=.gov, facebook #include_only=.nl,.de,.uk,.ie

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第二步：

[root@localhost ~]# vi /etc/yum.conf [main] cachedir=/var/cache/yum/$basearch/$releasever keepcache=0 debuglevel=2 logfile=/var/log/yum.log exactarch=1 obsoletes=1 gpgcheck=1 plugins=1//將plugins的值修改為0 installonly_limit=5 bugtracker_url=http://bugs.centos.org/set_project.php?project_id=23&ref=http://bugs.centos.org/bug_report_page.php?category=yum distroverpkg=centos-release #  This is the default, if you make this bigger yum won't see if the metadata # is newer on the remote and so you'll "gain" the bandwidth of not having to # download the new metadata and "pay" for it by yum not having correct # information. #  It is esp. important, to have correct metadata, for distributions like # Fedora which don't keep old packages around. If you don't like this checking # interupting your command line usage, it's much better to have something # manually check the metadata once an hour (yum-updatesd will do this). # metadata_expire=90m # PUT YOUR REPOS HERE OR IN separate files named file.repo # in /etc/yum.repos.d

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繼續運行，出現如下錯誤

[root@localhost ~]# yum install lrzsz Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"  One of the configured repositories failed (Unknown),  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=<repoid> …

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 <repoid>

or

subscription-manager repos –disable=<repoid>

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

compromise:

yum-config-manager –save –setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64

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原因：沒有配置resolv.conf

解決方法:

到/etc目錄下配置resolv.conf加入nameserver IP,如：

[root@localhost ~]# vi /etc/resolv.conf nameserver 8.8.8.8 nameserver 8.8.4.4 search localdomain

保存再次運行命令就可以。