# %wheel        ALL=(ALL)       ALL　← 先頭の＃を削除

[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
priority=1　← 追記
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-$releasever - Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
priority=2　← 追記
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
priority=2　← 追記
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
以下省略

[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
priority=2　← 追記
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

[epel-debuginfo]
name=Extra Packages for Enterprise Linux 6 - $basearch - Debug
#baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch/debug
以下省略

エラー:  Multilib version problems found. This often means that the root
        cause is something else and multilib version checking is just
        pointing out that there is a problem. Eg.:

           1. You have an upgrade for openssl which is missing some
            dependency that another package requires. Yum is trying to
            solve this by installing an older version of openssl of the
            different architecture. If you exclude the bad architecture
            yum will tell you what the root cause is (which package
            requires what). You can try redoing the upgrade with
            --exclude openssl.otherarch ... this should give you an error
            message showing the root cause of the problem.

           2. You have multiple architectures of openssl installed, but
            yum can only see an upgrade for one of those arcitectures.
            If you don't want/need both architectures anymore then you
            can remove the one with the missing update and everything
            will work.

           3. You have duplicate versions of openssl installed already.
            You can use "yum check" to get yum show these errors.

        ...you can also use --setopt=protected_multilib=false to remove
        this checking, however this is almost never the correct thing to
        do as something else is very likely to go wrong (often causing
        much more problems).

        Protected multilib versions: openssl-1.0.1e-48.el6.i686 != openssl-1.0.1e-48.el6_8.3.x86_64
   エラー: Protected multilib versions: nss-softokn-freebl-3.14.3-23.el6_7.i686 != nss-softokn-freebl-3.14.3-23.3.el6_8.x86_64

echo 'export RBENV_ROOT="/usr/local/rbenv"' >> /etc/profile
echo 'export PATH="${RBENV_ROOT}/bin:${PATH}"' >> /etc/profile
echo 'eval "$(rbenv init -)"' >> /etc/profile