[] ~/projects/jruby $ gem install rubygems-update -v 3.2.22
Fetching rubygems-update-3.2.22.gem
Successfully installed rubygems-update-3.2.22
Parsing documentation for rubygems-update-3.2.22
Installing ri documentation for rubygems-update-3.2.22
^C

[] ~/projects/jruby $ ls -R lib/ruby/gems/shared/gems/rubygems-update-3.2.14/
bin

lib/ruby/gems/shared/gems/rubygems-update-3.2.14//bin:
update_rubygems