Removing all installed Gems and starting over

Question

I recently started learning Ruby and Ruby on Rails, and have watched a plethora of getting started materials. I have been finding lately that I keep getting errors where gems w

Answer 1

Step 1:

I first kept running into an error that said:

You don't have write permissions for the /usr/bin directory

To get permission, I became a root user with (this is potentially dangerous for reasons beyond my current understanding):

sudo -s

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Step 2:

Then, I kept running into an error that said:

[gem] cannot be uninstalled because it is a default gem

This allowed me to uninstall everything:

for i in `gem list --no-versions`; do gem uninstall -aIx $i; done

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