No matter how you like to participate in developer communities, Pulumi wants to meet you there. If you want to meet other Pulumi users to share use-cases and best practices, contribute code or documentation, see us at an event, or just tell a story about something cool you did with Pulumi, you are part of our community.

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is
```pulumi preview -r &amp;&amp; pulumi up -y --diff
```
same as
```pulumi up -y --diff -r 
```
?

What's the implication if we run pulumi up without --refresh?

`--refresh` tells Pulumi to check if the resources under control have been modified outside of the Pulumi execution.

If you don’t do a `--refresh` and someone has modified a resource via the UI, Pulumi may not notice the change