Mastering Perl for Bioinformatics [Electronic resources] نسخه متنی

B.1 Installing Perl on Your Computer

Here
are the basic steps for installing Perl on your computer:

Check to see if Perl is already installed; if so, check the version.

Get Internet access and go to the Perl home page at http://www.perl.com.

Go to the Downloads page and determine which Perl distribution to
download.

Download the Perl distribution.

Install the distribution on your computer.

B.1.1 Perl May Already Be Installed

Many computersespecially Unix and Linux computerscome
with Perl already installed. (Note that Unix and Linux are
essentially the same thing, as far as the operating system is
concerned; Linux is a clone, or functional copy, of a Unix system.)
So, first check to see if Perl is already there. On Unix and Linux,
type the following at a command prompt:

$ perl -v

If Perl is already installed, you'll see a message
something like this:

This is perl, v5.8.0 built for i686-linux
Copyright 1987-2002, Larry Wall
Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.
Complete documentation for Perl, including FAQ lists, should be found on
this system using 'man perl' or 'perldoc perl'.  If you have access to the
Internet, point your browser at http://www.perl.com/, the Perl Home Page.

If Perl isn't installed, you'll get
a message something like this:

perl: command not found

If you're on a shared Unix system, at a university
or business, check with the system administrator if this fails,
because although Perl may be installed, your environment may not be
set to find it. (Or, the system administrator may say,
"You need Perl? Okay, I'll install
it for you!")

On Windows or Macintosh, look at the program menus, or use the
find program to search for
perl. You can also try typing
perl -v at an MS-DOS command
window or at a shell window on the Mac OS X. (Note that the Mac OS X
is a Unix system!)