This?
[root@smagadin ~]# dir -l /etc/yum.repos.d
total 36
-rw-r--r-- 1 root root 1991 May 18 22:47 CentOS-Base.repo
-rw-r--r-- 1 root root 647 May 18 22:47 CentOS-Debuginfo.repo
-rw-r--r-- 1 root root 630 May 18 22:47 CentOS-Media.repo
-rw-r--r-- 1 root root 6259 May 18 22:47 CentOS-Vault.repo
-rw-r--r-- 1 root root 289 May 18 22:47 CentOS-fasttrack.repo
-rw-r--r-- 1 root root 8621 Aug 16 00:25 mratwork.repo
[root@smagadin ~]# cat /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
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.
# 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
[root@smagadin ~]# cat /etc/*release
CentOS release 6.8 (Final)
CentOS release 6.8 (Final)
CentOS release 6.8 (Final)
[root@smagadin ~]# uname -m
x86_64
[root@smagadin ~]# free -m
total used free shared buffers cached
Mem: 1024 253 770 3 0 80
-/+ buffers/cache: 173 850
Swap: 512 0 512
[root@smagadin ~]# df -l /
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/simfs 41943040 1994620 39948420 5% /