Getopt « System Functions « Perl

1.Simple options
2.GetOptions("file=s" => \$file);
3.Generate random passwords?
4.Extract command-line switches with Getopt::Std
5.Perform consistent command line parsing
6.Process complex command lines
7.Read from a file
8.To turn a feature on or off. Use the exclamation point(!)
9.Using Getopt to deal with command line options

11.If the value is optional, use a colon
12.For a text string value, use :s for an optional value or =s for a required value:
13.Check if a file exists
14.A double dash (--) by itself signals the end of the command-line switches.