// see if file exists on remote
SSH::into($env)->exists( 'path/on/remote/filename.extension' );

// upload file to remote
SSH::into($env)->put( 'path/to/local/filename', 'path/on/remote/filename' );

// run a command - only works on SSH connections
SSH::into($env)->run( 'shasum path/on/remote/filename.extension', function( $line ) {
  // display output of command, by line
  echo $line;
} );

// download file from remote
SSH::into($env)->get( 'path/on/remote/filename', 'path/to/download/filename' );