Example of Unix commands implemented in Java

As an exercise I created some illustrative and simple implementations of common Unix commands. For those who are familiar with Unix-like systems them make easier to understand Java. For those who are familiar with Java them make easier to understand Unix-like systems. 1. PWD The first one is pwd that show the current working directory. public class Jpwd { public static void main(String[] args) { String pwd = System.getProperty("user.dir"); System.out.println(pwd); } } Running this at /ho