Usage To use Cwd.pm, you just do the following at the top of your program: #!/path/to/perl use Cwd; # you can choose any of the following functions: $dir = cwd;     # we'll see examples of this one $dir = cwd();     # older style, still works $dir = getcwd; $dir = fastcwd;     # considered more dangerous because may chdir $dir = fastgetcwd;     # considered more dangerous because may chdir