gem install passengerすると失敗する passenger < gem install passenger Fetching: rack-2.0.1.gem (100%) ERROR: Error installing passenger: rack requires Ruby version >= 2.2.2. ruby ruby -v ruby 2.1.4p265 (2014-10-27 revision 48166) [x86_64-linux] OSCentOS7 ruby2.2.22.2.2 2.1.xpassenger

passengerissue

rack requires Ruby version >= 2.2.2 · Issue #1710 · phusion/passenger

rack2.2


gem install rack -v=1.6.4
gem install passenger -v=5.0.30 --conservative


Ruby……(2.1……)