Install Ruby 1.92013/02/20

	The version of Ruby in CentOS 6 repository is 1.8 but Install 1.9 with RPM package if you need.
[1]	It's possible to install from CentOS SCLo Software Collections. It's OK to install it even if 1.8 is already installed because 1.9 is located on another PATH.

# install from SCLo

[root@dlp ~]#

yum --enablerepo=centos-sclo-rh -y install ruby193

[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 ruby193 bash

[root@dlp ~]#

ruby -v

ruby 1.9.3p484 (2013-11-22) [x86_64-linux]

[root@dlp ~]#

which ruby

/opt/rh/ruby193/root/usr/bin/ruby

[3]	If you'd like to enable Ruby 1.9 automatically at login time, configure like follows.

[root@dlp ~]#

vi /etc/profile.d/ruby193.sh

# create new

#!/bin/bash

source /opt/rh/ruby193/enable
export X_SCLS="`scl enable ruby193 'echo $X_SCLS'`"

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