add SCLo repo to Centos and install ruby 2.2

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Add CentOS SCLo Software collections Repository.
[root@dlp ~]# 
yum -y install centos-release-scl-rh centos-release-scl
# set [priority=10]

[root@dlp ~]# 
sed -i -e "s/\]$/\]\npriority=10/g" /etc/yum.repos.d/CentOS-SCLo-scl.repo 

[root@dlp ~]# 
sed -i -e "s/\]$/\]\npriority=10/g" /etc/yum.repos.d/CentOS-SCLo-scl-rh.repo
# for another way, change to [enabled=0] and use it only when needed

[root@dlp ~]# 
sed -i -e "s/enabled=1/enabled=0/g" /etc/yum.repos.d/CentOS-SCLo-scl.repo 

[root@dlp ~]# 
sed -i -e "s/enabled=1/enabled=0/g" /etc/yum.repos.d/CentOS-SCLo-scl-rh.repo
# if [enabled=0], input a command to use the repository

[root@dlp ~]# 
yum --enablerepo=centos-sclo-rh install [Package]

[root@dlp ~]# 
yum --enablerepo=centos-sclo-sclo install [Package]
[1]It's possible to install from CentOS SCLo Software Collections.
It's OK to install it even if 2.0 is already installed because 2.2 is located on another PATH.
# install from SCLo

[root@dlp ~]# 
yum --enablerepo=centos-sclo-rh -y install rh-ruby22
[2]Packages from Software Collections are installed uder the /opt directory.
To use it, Load environment variables like follows.
# load environment variables

[root@dlp ~]# 
scl enable rh-ruby22 bash
[root@dlp ~]# 
ruby -v 

ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]
[root@dlp ~]# 
which ruby 

/opt/rh/rh-ruby22/root/usr/bin/ruby

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