update ruby version
rvm list known
rvm install ruby@latest
ruby -v
## If it still shows you ruby 2.0., run rvm use ruby-X.X.X --default.update ruby version
rvm list known
rvm install ruby@latest
ruby -v
## If it still shows you ruby 2.0., run rvm use ruby-X.X.X --default.update ruby version ubuntu
# Use RVM to install ruby
# https://rvm.io/
# then run this command
# rvm install ruby@latestCopyright © 2021 Codeinu
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