13.4 Perl

This is the interpreter on a Unix-like system.

References for Perl:

• perl(1)

• Programming Perl, 3rd edition (O'Reilly)

• The Perl Directory

Short program example (creates newusers command entry):

     #!/usr/bin/perl
     # (C) Osamu Aoki Sun Aug 26 16:53:55 UTC 2001 Public Domain
     $pid=1000;
     while (<STDIN>) {
             if (/^#/) { next;}
             chop;
             $pid++;
             ($n1, $n2, $n3) = split / /;
             print $n1,"_",$n2,":", $n3, ":",$pid,
                       ":",$pid,",,,/home/",$n1,"_",$n2,":/bin/bash\n"
     }

Install Perl module module_name:

     # perl -MCPAN -e 'install module_name'