우분투 ubuntu Ruby 완전 삭제

sudo apt-get --purge remove ruby-full -y
sudo apt-get autoremove -y

sudo rm -rf /usr/local/lib/ruby
sudo rm -rf /usr/lib/ruby
sudo rm -f /usr/local/bin/ruby
sudo rm -f /usr/bin/ruby
sudo rm -f /usr/local/bin/irb
sudo rm -f /usr/bin/irb
sudo rm -f /usr/local/bin/gem
sudo rm -f /usr/bin/gem