[Truby@master ~]$ rvm list known
# MRI Rubies
[ruby-]1.8.6[-p420]
[ruby-]1.8.7[-head] # security released on head
[ruby-]1.9.1[-p431]
[ruby-]1.9.2[-p330]
[ruby-]1.9.3[-p551]
[ruby-]2.0.0[-p598]
[ruby-]2.1.4
[ruby-]2.1[.5]
[ruby-]2.1-head
ruby-head
。。。。。。