rbenv: no such command `install' となってinstallできない時の対処

エラー内容

rbenvで違うバージョンのrubyをインストールしようとしたら以下のメッセージが出た

$ rbenv install -l
rbenv: no such command `install`

$ rbenv install 2.5.1
rbenv: no such command `install'

解決

ruby-buildが必要でそれをcloneしたら解決

$ git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
Cloning into '/root/.rbenv/plugins/ruby-build'...
remote: Enumerating objects: 8, done.
remote: Counting objects: 100% (8/8), done.
remote: Compressing objects: 100% (8/8), done.
remote: Total 10685 (delta 0), reused 3 (delta 0), pack-reused 10677
Receiving objects: 100% (10685/10685), 2.23 MiB | 705.00 KiB/s, done.
Resolving deltas: 100% (7027/7027), done.

$ rbenv install -l
1.8.5-p52
1.8.5-p113
1.8.5-p114