[root@oldboyedu ~]#  vim  /etc/yum/pluginconf.d/fastestmirror.conf

[main]

enabled=0---------把原来的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

~                                                                                              

~                                                                                              

~                                                                                              

~                                                                                              

~                                                                                              

~                                                                                              

"/etc/yum/pluginconf.d/fastestmirror.conf" 12L, 279C written

第二步：

[root@oldboyedu ~]# 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=0      -----把原来的1改为0

installonly_limit=5

bugtracker_url=http://bugs.centos.org/set_project.php?project_id=19&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.

"/etc/yum.conf" 25L, 969C written