Ruby：CentOS：Rubyをインストール

CentOS 6.10 (x86)

CentOSにRubyをインストールしてみる。

※ 参考
(2018.02.02)
CentOS 7.3にRuby 2.4.1をインストールする - Qiita

rbenvインストール

■gitインストール

sudo yum install git

[testuser@localhost ~]$ sudo yum install git
　:
完了しました!

■rbenv取得

git clone https://github.com/rbenv/rbenv.git ~/.rbenv

[testuser@localhost ~]$ git clone https://github.com/rbenv/rbenv.git ~/.rbenv
Initialized empty Git repository in /home/testuser/.rbenv/.git/
remote: Enumerating objects: 2744, done.
remote: Total 2744 (delta 0), reused 0 (delta 0), pack-reused 2744
Receiving objects: 100% (2744/2744), 515.63 KiB | 624 KiB/s, done.
Resolving deltas: 100% (1720/1720), done.

■rbenvパス設定／有効化

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
~/.rbenv/bin/rbenv init
source ~/.bash_profile

[testuser@localhost ~]$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
[testuser@localhost ~]$ ~/.rbenv/bin/rbenv init
# Load rbenv automatically by appending
# the following to ~/.bash_profile:

eval "$(rbenv init -)"

[testuser@localhost ~]$ source ~/.bash_profile

■動作確認

rbenv -v

[testuser@localhost ~]$ rbenv -v
rbenv 1.1.1-39-g59785f6

ruby-buildインストール

■ruby-build取得

git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build

[testuser@localhost ~]$ git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
Initialized empty Git repository in /home/testuser/.rbenv/plugins/ruby-build/.git/
remote: Enumerating objects: 51, done.
remote: Counting objects: 100% (51/51), done.
remote: Compressing objects: 100% (34/34), done.
remote: Total 9642 (delta 19), reused 43 (delta 11), pack-reused 9591
Receiving objects: 100% (9642/9642), 2.02 MiB | 1.25 MiB/s, done.
Resolving deltas: 100% (6307/6307), done.

■ruby-buildインストール

sudo ~/.rbenv/plugins/ruby-build/install.sh

[testuser@localhost ~]$ sudo ~/.rbenv/plugins/ruby-build/install.sh

■動作確認

rbenv install -l

[testuser@localhost ~]$ rbenv install -l
　:
  truffleruby-1.0.0-rc9

Rubyインストール

■openssl readline zlibインストール

sudo yum install -y openssl-devel readline-devel zlib-devel

[testuser@localhost ~]$ sudo yum install -y openssl-devel readline-devel zlib-devel
　:
完了しました!

■Rubyインストール

rbenv install 2.4.1

[testuser@localhost ~]$ rbenv install 2.4.1
Downloading ruby-2.4.1.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.1.tar.bz2
Installing ruby-2.4.1...

BUILD FAILED (CentOS release 6.10 (Final) using ruby-build 20190130)

Inspect or clean up the working tree at /tmp/ruby-build.20190203193650.7712
Results logged to /tmp/ruby-build.20190203193650.7712.log

Last 10 log lines:
checking for ruby... false
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/tmp/ruby-build.20190203193650.7712/ruby-2.4.1':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details

→ BUILD FAILED となった。gccをインストールしていないのが原因と思われる。
gccをインストール

sudo yum install gcc

[testuser@localhost ~]$ sudo yum install gcc
　:
完了しました!

再度rubyをインストール

[testuser@localhost ~]$ rbenv install 2.4.1
Downloading ruby-2.4.1.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.1.tar.bz2
Installing ruby-2.4.1...

Installed ruby-2.4.1 to /home/testuser/.rbenv/versions/2.4.1

何も出ないのでOKか？

■パス設定

echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
source ~/.bash_profile

[testuser@localhost ~]$ echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
[testuser@localhost ~]$ source ~/.bash_profile

■バージョン設定

rbenv global 2.4.1

[testuser@localhost ~]$ rbenv global 2.4.1

■動作確認

ruby -v

[testuser@localhost ~]$ ruby -v
ruby 2.4.1p111 (2017-03-22 revision 58053) [i686-linux]

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[Rudy]