Packer --help

packer --help
Usage: packer [--version] [--help] <command> [<args>]

Available commands are:
   build       build image(s) from template
   console     creates a console for testing variable interpolation
   fix         fixes templates from old versions of packer
   inspect     see components of a template
   validate    check that a template is valid
   version     Prints the Packer version

packer build

packer validate example.json
Template validated successfully.

See also

• Packer, packer --help, packer version, packer build