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# Checksum is required

It may fail to install a tool by the error `checksum is required`.

e.g.

```console
$ terracognita --help
INFO[0000] download and unarchive the package            aqua_version= env=darwin/arm64 exe_path=/Users/shunsukesuzuki/.local/share/aquaproj-aqua/pkgs/github_release/github.com/cycloidio/terracognita/v0.8.1/terracognita-darwin-amd64.tar.gz/terracognita-darwin-amd64 package=cycloidio/terracognita package_name=cycloidio/terracognita package_version=v0.8.1 program=aqua registry=standard require_checksum=true
FATA[0000] aqua failed                                   aqua_version= env=darwin/arm64 error="checksum is required" program=aqua
```

## What does this error mean?

Please see [require_checksum](/docs/reference/config/checksum#require_checksum).
