Cat command in Linux

Cat command in Linux

$ cat program.pl program2.pl
#!/usr/bin/perl
 if( 2 ge 3) {
     print "greater\n";
} else {
     print "lesser\n";
 }

#!/usr/bin/perl
@arr = qw(1 2 3);
$ref = \@arr;
print ref $ref;

Example 2: 

#!/usr/bin/perl
 if( 2 ge 3) {
     print "greater\n";
} else {
     print "lesser\n";
 }

#!/usr/bin/perl
@arr = qw(1 2 3);
$ref = \@arr;
print ref $ref;

Example 3: 

Step 1: Start
Step 2: Declare variables a,b and c.
Step 3: Read variables a,b and c.
Step 4: If a>b
           If a>c
              Display a is the largest number.
           Else
              Display c is the largest number.
        Else
           If b>c
              Display b is the largest number.
           Else
              Display c is the greatest number.
Step 5: Stop

Script for installing Latest Java Version

#!/bin/bash
# Installed on debian wheezy
wget http://download.igniterealtime.org/openfire/openfire_3.8.2_all.deb
dpkg -i openfire_3.8.2_all.deb
# apt-get install -y openjdk-6-jre-headless # this may not be needed.
apt-get install -y default-jre-headless
dpkg -i openfire_3.8.2_all.deb
/etc/init.d/openfire start
# start a web browser and navigate to http://host.domain.tld:9090
# and follow the wizard to setup the server.