A quick rundown of what we've learned in this chapter.
Anything you can do on the command line, Puppet can do with an exec resource. Specify the command to run using the command attribute:
exec { 'Run my arbitrary command':
command => '/bin/echo I ran this command on `/bin/date` >/tmp/command.output.txt',
}By default, an exec resource will always be applied, every time you run Puppet. There are several ways to control whether or when an exec will be applied:
createsruns theexeconly if a given file doesn't existonlyifruns theexeconly if a given command succeedsunlessruns theexeconly if a given command fails
To run the command in a specified directory, use the cwd attribute:
exec { 'Download public key for John':
cwd => '/tmp',
command => '/usr/bin/wget http://bitfieldconsulting.com/files/john.pub',
creates => '/tmp/john.pub',
}To apply the command only when triggered by some other resource, use the refreshonly attribute:
exec { 'icinga...