如何在 CentOS 7 下用 yum 及 rvm 安裝 Ruby 2.5

Ruby 是一種物件導向、命令式、函數式、動態的通用程式語言。這邊介紹如何在CentOS 7下安裝Ruby 2.5

(1) 安裝相關套件
# yum install gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel openssl-devel make bzip2 autoconf automake libtool bison iconv-devel sqlite-devel

(2) Install RVM
# curl -L get.rvm.io | bash -s stable
# source /etc/profile.d/rvm.sh
# rvm reload

(3) Verify Dependencies
# rvm requirements run

Checking requirements for centos.
Requirements installation successful.

(4) Install Ruby 2.5
# rvm install 2.5

[Sample Output]

QUOTE:

Searching for binary rubies, this might take some time.
No binary rubies available for: centos/7/x86_64/ruby-2.5.1.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for centos.
Requirements installation successful.
Installing Ruby from source to: /usr/local/rvm/rubies/ruby-2.5.1, this may take a while depending on your cpu(s)...
ruby-2.5.1 - #downloading ruby-2.5.1, this may take a while depending on your connection...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 13.3M  100 13.3M    0     0   866k      0  0:00:15  0:00:15 --:--:--  823k
ruby-2.5.1 - #extracting ruby-2.5.1 to /usr/local/rvm/src/ruby-2.5.1.....
ruby-2.5.1 - #configuring..................................................................
ruby-2.5.1 - #post-configuration..
ruby-2.5.1 - #compiling....................................................................
ruby-2.5.1 - #installing.............................
ruby-2.5.1 - #making binaries executable..
ruby-2.5.1 - #downloading rubygems-2.7.7
ruby-2.5.1 - #extracting rubygems-2.7.7.....................................................
ruby-2.5.1 - #removing old rubygems........
ruby-2.5.1 - #installing rubygems-2.7.7................................
ruby-2.5.1 - #gemset created /usr/local/rvm/gems/ruby-2.5.1@global
ruby-2.5.1 - #importing gemset /usr/local/rvm/gemsets/global.gems...................................................
ruby-2.5.1 - #generating global wrappers.......
ruby-2.5.1 - #gemset created /usr/local/rvm/gems/ruby-2.5.1
ruby-2.5.1 - #importing gemsetfile /usr/local/rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.5.1 - #generating default wrappers.......
ruby-2.5.1 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
Install of ruby-2.5.1 - #complete
Ruby was built without documentation, to build it run: rvm docs generate-ri

(6) 確認 ruby 版本
# ruby -v

ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]

恭喜...這樣就安裝好囉

參考文章：
https://tecadmin.net/install-ruby-latest-stable-centos/