Quick way to switch between folders in the terminal

A couple of days ago a found a really neat trick you can use when you are in the terminal window.

cd -

It will move you from the directory you were in to the directory you were in last, typing it again will bring you back to that first directory.

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Ruby

Rubocop CircleCI Config

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Testing DNS Speeds

Here are some quick scripts for testing DNS speeds and comparing the results.