No targets have been specified for this build

I am trying to create a project using Project-generator.jar from Linux terminal. I am using the command

java -jar project-generator.jar

      

        
        
        
      

    

in the last step it shows an error

[ERROR] No goals have been specified for this build. 
You must specify a valid lifecycle phase or a goal in the 
format <plugin-prefix>:<goal> or <plugin-group-id>:<plugin-artifact-id>[:<plugin-version>]:<goal>. 
Available lifecycle phases are: validate, initialize, generate-sources,
process-sources, generate-resources, process-resources, compile, process-classes,
generate-test-sources, process-test-sources, generate-test-resources, 
process-test-resources, test-compile, process-test-classes, test, 
prepare-package, package, pre-integration-test, integration-test, 
post-integration-test, verify, nstall, deploy, pre-clean, clean, post-clean, 
pre-site, site, post-site, site-deploy. -> [Help 1]
org.apache.maven.lifecycle.NoGoalSpecifiedException: 
No goals have been specified to create a project using Project-generaotot.jar 
from Linux terminal.