[mshaik@server ~]$ sudo yum install gem [mshaik@server ~]$ sudo gem install yaml-lint [mshaik@server ~]$ yaml-lint /etc/puppetlabs/code/environments/production/hieradata/common.yaml Checking the content of ["/etc/puppetlabs/code/environments/production/hieradata/common.yaml"] File : /etc/puppetlabs/code/environments/production/hieradata/common.yaml, Syntax OK Done.