net stop beep

if you want the beep to be disabled after the restart:

sc config beep start=  disable

#this is a comment
print “hello world\n”;

print “hello
with line break\n”;
print ‘hello world\n’,”\n”; #only double quotes interpolate vars and special chars

#——————variables—————
my $name =”eric”;
my $age = 10;
print “\nmy name is $name\n”;
#—————-variable scoping—————-

{my $local_counter = 0;print “local variable value printed $local_counter\n”;} #local variable
#print $local_counter; gives error if uncommented

#——————-arrays——————
my @courses = (“math”, “physics”, “chemistry”,”biology”);
my @grades = (70,90,80);
my @mix = (“math”,70);

print “course = $courses[0]\n”;

# $#mix gives the index of the last element in the @mix array
print “grade = $grades[$#mix]\n”;
print “all elements in the array are @grades\n”;
print “last three courses are @courses[($#courses-2)..$#courses]\n”;
print “all grades @grades[0..$#grades]\n”;

my @sorted_grades = sort @grades;
my @reversed = reverse @sorted_grades;
print “my sorted grades are @sorted_grades and reversed @reversed\n”;

#paranteses are required around @courses
foreach my $temp_course (@courses){
print $temp_course;
}

#——————–hashes——————-
my %course_grades = (“math”,70,”physics”,80,”biology”,100);
my %student_ages = (“eric”, 10, “djikstra”, 11);
print “eric is $student_ages{‘eric’} years old\n”;
print “I scored $course_grades{‘math’} in math\n”;
my @hash_courses = keys %course_grades;
my @hash_grades = values %course_grades;

print “hash keys are @hash_courses and values are @hash_grades\n”;

foreach my $course (keys %course_grades){
print “I get $course_grades{$course} in $course\n”;
}

#———————conditional—————————-
#braces are required
my $counter = 10;
if( $counter > 0 ){
print “conditional true\n”;
}
else {
print “conditional false\n”;
}

#—————-loops—————
my $count = 0;
#—–while
while( $count < 10 ){
print "$count ";
$count++;
}

#—–for
for($count = 0; $count < 10; $count++){
print $count;
}

#—foreach
my @numbers = (1,2,3,4,5);
print "using foreach\n";
print $numbers[$_] foreach 0..$#numbers;

#————–operators——————–
# numeric comparison == != > >= 99 ) { print “great\n”;}
if( 100 gt 99 ) {}else { print “not great\n”;}

# . string concatenation
my $teacher = ‘jordan’;
$teacher .= “\n”;
print $teacher;

#—————-file operations————
# $! usage ? (error type ?)

# write, >> append
open(my $file, “<","log.txt") or die "could not open file $!\n";

my $line = ;
print “read a single line : $line \n”;

# store all of the remaining file in @text
my @text = ;
print @text;
close $file or die “$!”;
#use

open(my $file, “<","log.txt") or die "could not open file $!\n";
while( ) {
print “$_”;
}
close $file or die “$!”;

open(my $file_append, “>>”,”students.txt”) or die “could not open file $!\n”;
#writing to a file

my @students = (“john”, “marry”, “christina”);

foreach my $student_temp (@students){
print $file_append $student_temp.”\n”;
}
close $file_append or die “$!”;

namespace helloWorld
{
class Hello
{
static void Main(string[] args)
{
Console.WriteLine(“Hello World!”);
}
}
}

solution: in ubuntu, system->preferences->keyboard->layouts->keyboard model
thfen try one of the listed configurations which fits your computer’s
specifications

comment:
I installed vmware player on xp and used ubuntu as the guest operating system. Some keys were not functioning properly such that arrow keys.

All the solutions I found by googling was related to modifying vmare.config file. But this solution assumes that you have installed the vmware on a ubuntu installed machine.(host system) in my case it is the xp operating system. so such solution does not work

ubuntu version
cat /etc/issue
or
cat /etc/lsb-release

Unpack the tarball:
tar xfz kt-src-oss-3.7.0.2.tgz

move the directory(unpacked_directory) under the directory /var/www/ in order to run knowledgetree by calling http://yourserver/unpacked_directory
mv unpacked_directory /var/www/knowledgetree

Give the ownership of the files to the apache user
chown -R www-data:www-data /var/www/knowledgetree

create the database and the account following the console sequence below

mysql -u root -p
Enter password:
mysql> create database dms;
mysql> grant all on dms.* to ‘dms’@'%’ identified by ‘new_password’;
mysql> flush privileges;
mysql> exit;

Now change the config.ini file of the knowledgetree located under the directory ‘unpacked_directory/config/’ as shown below

rootUrl = /unpacked_directory
dbPass = ‘new_password’
dbAdminUser = dms
dbAdminPass = ‘new_password’

Run sql scripts located under the ‘unpacked_directory/sql/mysql/install’
directory:
mysql -u root -p dms < structure.sql
mysql -u root -p dms < data.sql

An Important Step
Configure php.ini file
increase the memory limit until no memory related error occurs when you run the knowledgetree system

memory_limit = 64

restart the apache to settings to take effect
apache2 restart

Login to the KnowledgeTree!

http://yourserver/unpacked_directory

default login credentials:
username: admin
password: admin

reference:
http://wiki.knowledgetree.org/Debian_4_Installation_Instructions

stop the mysql process:
kill `cat /pid_directory/host_name.pid`
Use backticks (not forward quotation marks) with the cat command.

Now create a text file with the content given below:

UPDATE mysql.user SET Password=PASSWORD(‘new_password’) WHERE User=’root’;
FLUSH PRIVILEGES;

start the mysql server:
mysqld_safe –init-file=created_file_directory &

Now mysql root account is ready to go with the new_password

reference:
http://dev.mysql.com/doc/refman/5.1/en/resetting-permissions.html#resetting-permissions-unix

APEX_MAIL package is used for sending email from APEX.

Usage:
DECLARE
l_body CLOB;
l_body_html CLOB;

BEGIN
l_body := l_body ||’ Message Body’||utl_tcp.crlf;
l_body_html :=”;
l_body_html := l_body_html || ‘html body’;
l_body_html :=

APEX_MAIL.send(
p_to => ‘to_email@domain.com’,
p_from => ‘from_email@domain.com’,
p_body => l_body,
p_body_html => l_body_html,
p_subj => ‘Subject’);
APEX_MAIL.push_queue;
END;

UTL_SMTP is required to use APEX_MAIL.
APEX_MAIL contains these there procedures:
APEX_MAIL.SEND
APEX_MAIL.ADD_ATTACHMENT
APEX_MAIL.PUSH_QUEUE

Configuration of APEX to Send Mail
Login as Administrator
Manage Instance -> Instance Settings -> Email

PUSH_QUEUE Procedure
APEX holds email messages in a table named APEX_MAIL_QUEUE before sending them.
APEX_MAIL.PUSH_QUEUE can be used to send email messages without waiting them in the queue.

SEND Procedure
Send an email message from an Application using this procedure.
Caution! : include line feed ( utl_tcp.crlf ) every 1000 characters

Syntax
APEX_MAIL.SEND(
p_to IN VARCHAR2,
p_from IN VARCHAR2,
p_body IN [ VARCHAR2 | CLOB ],
p_body_html IN [ VARCHAR2 | CLOB ] DEFAULT NULL,
p_subj IN VARCHAR2 DEFAULT NULL,
p_cc IN VARCHAR2 DEFAULT NULL,
p_bcc IN VARCHAR2 DEFAULT NULL,
p_replyto IN VARCHAR2);

Notes:
use a comma-separated list for using multiple email addresses.
use valid email addresses otherwise email will not be sent.