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`pulumi up`
That will run the program and create any new resources it now declares

But it will also try to create resources on the cloud too, correct?

I just want to add resources into pulumi stack, without interfering with cloud infrastructure.

That's an odd scenario. You want to update state to declare resources that don't yet exist? That's not how stacks are meant to be used.

To be clear, I have some resources I have created using AWS management console, and wrote my code about these resources myself.

And I want pulumi stack to be aware of these resources

`pulumi import`, <https://www.pulumi.com/docs/reference/cli/pulumi_import/|https://www.pulumi.com/docs/reference/cli/pulumi_import/> ?

Got another question:
Let's say I have a Lambda function with tag `foo:bar` applied to it. However, I somehow forgot to add tags to my pulumi code.

Will running `pulumi up` remove the tag `foo:bar` applied to the Lambda function?

Yes, pulumi will try to update the resource to match what the program asked for.

yes, pulumi will converge the resources to their declarative definitions, unless you're explicitly ignoring some properties with `ignoreChanges`

I have some resources imported using `pulumi import`, but I'm afraid to run `pulumi up` because of unintented changes to my resources on AWS.

Is `pulumi import` trustable..?

`import` can not change anything in AWS it only does read-only operations

`up` will by default show a preview of what changes it intends to make allowing you to say No and not apply them

and yes, `import` only changes the Pulumi state, not the actual resources (as well as `refresh`)

After `pulumi import`ing resources I want, and right after when I run `pulumi preview`, there are tons of changes being displayed..

Well if your program doesn't match whats been imported then there will be a load of changes. Either accept them, or update your program and keep running preview till it looks like what you want.

Okay, thanks..
I always copy &amp; paste `import` commands from docs page, but by mistake, I imported a resource with wrong name. How can I remove this resource on pulumi stack?

`pulumi state delete` <https://www.pulumi.com/docs/reference/cli/pulumi_state_delete/>