Install a package and all its dependencies without a confirmation prompt with FreeBSD pkg

Try

pkg install -y webmin nginx nano

Check man pkg-install:

SYNOPSIS

pkg install [-AfgIinFqRUxy] [-r reponame] pkg-origin ...

...
 -y  Assume yes when asked for confirmation before package installation.

Note the y in [-AfgIinFqRUxy]!

Alternatively you can use yes command.

yes | pkg install webmin nginx nano

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