How do I make Ruby 1.9 the default Ruby on Ubuntu?

ruby ubuntu ruby-1.9

Martin DeMello · Dec 12, 2009 · Viewed 42.7k times · Source

Is there any way, on Ubuntu 9.04, to install Ruby 1.8 as ruby1.8 (or get rid of it altogether) and have Ruby 1.9 be the default ruby?

Answer

I'm not really sure, but maybe this can help:

update-alternatives --config ruby

... and here's the non-interactive, scriptable, way:

update-alternatives --set ruby /usr/bin/ruby1.9.1

You may find out about available alternatives and respective /usr/bin/... paths by doing:

update-alternatives --query ruby