After you have entered and saved the program make sure the file is executable by using the following command.

At the UNIX prompt, where the programname is filename of the program. Now to run the program just type any of the following command at the prompt.

If something goes wrong in the program you may get error message, or may get nothing. You can also run the program with warnings using the following command.

At the prompt. this will display warnings and other helpful messages before trying to execute the program. To run the program with a debugger use the following command

When executed, Perl first compiles the file and then executes the compiled version. So with short pause for compilation the program should run quite quickly. This tells, why do you get compilation errors when you execute a Perl file which consists only text.

Make sure that your program will work before proceeding. The program's output sometimes may be slightly unexpect.