How can I completely uninstall and then reinstall Meteor.js?

Question

My app started crashing for absolutely no reason. I rolled back to a version I knew worked, but it is still crashing. I cloned a version from github that I absolutely know was working because I've been working on it for a week. It won't start. Everything is 'undefined' -- Meteor, UI, Router, Template, etc. I don't have time for this. How can I completely uninstall Meteor and reinstall it from scratch? For bonus points: why did this happen and how can I prevent it from happening again?

Accepted Answer

Let’s start with the deletions, then we’ll move on to the reinstallations.

If you ever installed Meteorite, uninstall and delete it:

```
sudo mrt uninstall
sudo mrt uninstall --system
rm -rf ~/.meteorite
```

Then delete Meteor:

```
sudo rm /usr/local/bin/meteor
rm -rf ~/.meteor
```

Now start over at the beginning:

Repair permissions if necessary:

```
sudo chown -R $(whoami) ~/.npm
```

Reinstall Meteor:

```
curl https://install.meteor.com/ | sh
```

Next check that your project has all its proper packages:

```
cd /path/to/your/project
meteor update
```

If your project still won’t compile, you can reset it (warning: deletes database):

```
cd /path/to/your/project
meteor reset
```

Still no luck? Recreate the Meteor project (warning: deletes database and the project’s memory of what packages you’ve installed):

```
cd /path/to/your/project
rm -rf ./.meteor
cd ..
meteor create project-new
rm ./project-new/project-new.*
mv ./project/* ./project-new/
cd ./project-new
```

(and run `meteor add *packagename*` over and over to reinstall each package you were using)

How can I completely uninstall and then reinstall Meteor.js?

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