Ubuntu16.04 update ruby-2.6!

The blog preview requires Ruby, currently version 2.3:

ruby -v
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You need to update 2.6 by adding the repository first:

sudo add-apt-repository ppa:brightbox/ruby-ng
sudo apt-get update
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Delete earlier versions of Ruby:

sudo apt-get purge --auto-remove ruby
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Install ruby-2.6:

Sudo apt-get install ruby2.6 ruby2.6-devCopy the code

Done!