What should I do if centos7 yum fastestmirror cannot be used?

The following column centos basic tutorial will introduce to you the solution to the problem that centos7 yum fastestmirror cannot be used. I hope it will be helpful to friends in need!

centos7 yum fastestmirror cannot be used

[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"

======================== ===========================

Step one:

[root@localhost ~]# vi  /etc/yum/pluginconf.d/fastestmirror.conf 
[main]
enabled=1//把1改为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

====== ======================================

Step 2:

[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//将plugins的值修改为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

================================================

Continue running, the following error occurs

[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 much

      slower). If it is a very temporary problem though, this is often a nice

        compromise:

yum-config-manager --save --setopt=.skip_if_unavailable=true

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

= =============================================

Reason: resolv.conf is not configured

Solution:

Configure resolv.conf in the /etc directory and add the nameserver IP, such as:

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

Save again Just run the command.

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