Tinkering with Perl

chmod

chmod is the Unix command used to set permissions, including telling the computer that a file can be run as a program.

To make it so that everybody can use a program, type:

chmod 755 filename

where filename is the name of the file, which should be something like "hello_world.pl".

Alternately, to make it so that only you can use the program, type:

chmod 700 filename

You must do this before you can run a program. If you've been following along this book in order, please type:

chmod 755 hello_world.pl

And now, you're ready to run it!

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