WP_Filesystem_SSH2::run_command( string $command, bool $returnbool = false )

	public function run_command( $command, $returnbool = false ) {
		if ( ! $this->link )
			return false;

		if ( ! ($stream = ssh2_exec($this->link, $command)) ) {
			$this->errors->add( 'command',
				/* translators: %s: command */
				sprintf( __( 'Unable to perform command: %s'),
					$command
				)
			);
		} else {
			stream_set_blocking( $stream, true );
			stream_set_timeout( $stream, FS_TIMEOUT );
			$data = stream_get_contents( $stream );
			fclose( $stream );

			if ( $returnbool )
				return ( $data === false ) ? false : '' != trim($data);
			else
				return $data;
		}
		return false;
	}