rubyのパスを一々手作業で設定するのは面倒なのでrbenvを設定する。いつもの引用から。 rbenvインストールhttps://github.com/rbenv/rbenv#basic-github-checkout sudo yum install git wget gcc make openssl-devel readline-devel git clone https://github.com/rbenv/rbenv.git ~/.rbenv cd ~/.rbenv && src/configure && make -C src echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile ~/.rbenv/bin/rbenv init vi ~/.bash_profile # Load rbenv automatically by appending # the following to ~/.bash_profile: eval "$(rbenv init - bash)" 一応再読み込み . ~/.bash_profile curl -fsSL https://github.com/rbenv/rbenv-installer/raw/main/bin/rbenv-doctor | bash Checking for `rbenv' in PATH: /home/ec2-user/.rbenv/bin/rbenv Checking for rbenv shims in PATH: OK Checking `rbenv install' support: not found Unless you plan to add Ruby versions manually, you should install ruby-build. Please refer to https://github.com/rbenv/ruby-build#installation Counting installed Ruby versions: none There aren't any Ruby versions installed under `/home/ec2-user/.rbenv/versions'. You can install Ruby versions like so: rbenv install <version> Checking RubyGems settings: OK Auditing installed plugins: OK mkdir -p "$(rbenv root)"/plugins git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build rubyをインストールする。 rbenv install --list 2.6.7 2.7.3 3.0.1 jruby-9.2.17.0 mruby-3.0.0 rbx-5.0 truffleruby-21.1.0 truffleruby+graalvm-21.1.0 rbenv install 2.7.3 # rubyインストール rbenv install