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(xù)運行，出現(xiàn)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= …? ? ?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 ? ? ? ? or? ? ? ? ? ? subscription-manager repos –disable=? ? ?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=.skip_if_unavailable=trueCannot 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。
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