private void cat(String[] cmd) {
        File f = new File(wd, cmd[1]);
        BufferedReader br = null;

        try {
            br = new BufferedReader(new FileReader(f));

            String line;
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }
        } catch (FileNotFoundException fnf) {
            System.out.println("file was not found");

        } catch (IOException e) {
            e.printStackTrace();

        } finally {
            try {
                if (br != null)
                    br.close();
            } catch (IOException e) {
                System.out.println("couldn't close br");
            }
        }

    }