Install Ruby 2.2

Install Ruby 2.2 2015/07/05

	The version of Ruby in CentOS 7 repository is 2.0 but Install 2.2 with RPM package if you need.
[1]	Install development packages.

[root@dlp ~]#  yum -y groups install "Development Tools" # install from EPEL [root@dlp ~]#  yum --enablerepo=epel -y install gdbm-devel libdb4-devel libffi-devel libyaml libyaml-devel ncurses-devel openssl-devel readline-devel tcl-devel

[2]	Download Ruby source and build RPM from it. Make sute the latest one and Download it from the site below. ⇒ https://www.ruby-lang.org/

[root@dlp ~]#  mkdir -p rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}  # dowload source [root@dlp ~]#  wget http://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.3.tar.gz -P rpmbuild/SOURCES  # download SPEC file [root@dlp ~]#  wget https://raw.githubusercontent.com/tjinjin/automate-ruby-rpm/master/ruby22x.spec -P rpmbuild/SPECS [root@dlp ~]#  rpmbuild -bb rpmbuild/SPECS/ruby22x.spec [root@dlp ~]#  rpm -Uvh rpmbuild/RPMS/x86_64/ruby-2.2.3-1.el7.centos.x86_64.rpm  Preparing... ################################# [100%] Updating / installing... 1:ruby-2.2.3-1.el7.centos ################################# [100%] [root@dlp ~]#  ruby -v  ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-linux] [root@dlp ~]#  gem -v  2.4.5.1