Hiding a folder in your Mobile phone (java based phones only)

You may be tried off many tricks to hide a folder in your java based mobile phone… But those tricks may not be satisfactory for you to keep your privacy…

I will show you one of the nicest methodes for hiding the folder safe wherever in memory card or phone memory. Go through the following steps one after the other…

Hiding the folder :

1. Create a folder and give it a file name ending with  .jad extension. That is  filename.jad

2. Copy the required files to this folder

3. Create another folder in the same directory with same file name ending with  .jar extension. That is  filename.jar

4.  After the above step when you come back you can’t see the folder ending with .jad extension. That is the contents

in the foldrname.jad is now hidden…

Viewing  the hidden folder :

5. Only thing that you have to view the hidden folder is just rename the folder ending with  .jar to some other extension.

Change it to whatever you like. The only condition is that it’s name should not end with .jar. Let’s give some .jaa or  .j or  .z or anything you like…

 

How it works ?

In most java based mobile phones like Nokia 5200, 5300 etc… the apllications are jar files having extension .jar

Most of these applications also creates jad files with same filename, which is usually hidden while you view it from mobile

phones, actually phone hides those files. Thus the jar file is the key behind hiding and unhiding. If you change the extension of

jar file to some other character then the jad file becomes unknown to the phone’s browser and hence it displays the jad file…

Hopes you enjoyed the trick.

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How to change login screen picture in Ubuntu

Bored with seeing the same theme always when you start your system….

Here is a simple way to hack the gdm theme in your Ubuntu..

The Ubuntu themes data are stored in the folder :

/usr/share/gdm/themes

go to this folder and select any of the theme, here say ‘human vista’ enter that folder.

U can see the picture file that u see while logging on to your system. Delete the file that is shown as the background image and note down its name as if along with the extension. Copy the image file that you like, to the same location and rename it as the name of the previously deleted file… Thats all …

If you want to change the login window theme in Ubuntu.. look the picture

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Configuring your lamp server (post installation)

This post is all about configuring the lamp server for doing your php coding, for running mysql queries…I’m not going to talk anything about installing the lamp server (Linux Apache MySql PHP) … just about some post installation activities… While using a lamp server you are using apache server to service for the php scripts.

First we have to set the localhost address to a convinient folder for placing your web based projects or programs…

To set a common directory for all the users using the same linux system follow the steps here

• 1. Take the gnome terminal
  Applications -> Accessories -> Terminal

• 2. Type in $sudo a2enmod userdir
  

  Then the terminal prompts for the password… type in and kick on the enter key…

• . To make this change to be take into effect you have to restart the apache server…that’s what we do in this step. Type in the terminal as follows..

$ /etc/init.d/apache2 restart

• 4. The above step enables the user directory called public_html as the default location (home page of the apache server) of the localhost. We have enabled it in the previous step… then who will create that folder….let’s do it now. Type in the terminal

$ cd ~

$ mkdir public_html

• 5. That’s all about configuring. Now you have to check everything done so far was right Letz write a sample php program and save it in that folder.. here is how i did it using the terminal

$ gedit (It will open a the gedit text editor)

• write the following php script in it and save it as x.php in the /home/your_username/public_html directory as in figure
  

• 6. That’s all … it’s the time to see the output of that phpscript. . . Take the web browser say mozilla forefox, Then type in the address bar as follows.

127.0.0.1/~your_username/ or localhost/~your_username

• 7. You can see their recently created x.php … Click on it and check wheather it loads the php information page

Itz all over. For veiwing the web pages or phpscripts you have save it to the public_html folder and call the same address in the address bar of the browser….

Comment if you find any difficulties or problems …

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Computer Graphics : Bucket overflowing with water

Computer Graphics program to illustrate a bucket overflowing with water...

#include"conio.h"
#include"dos.h"
#include"graphics.h"

void main()
{
int gd=DETECT,gm=DETECT,i,j;
initgraph(&gd,&gm,”c:\tc\bgi”);
ellipse(300,200,0,360,50,25);
ellipse(300,300,0,360,50,25);
line(250,200,250,300);
line(350,200,350,300);
ellipse(300,100,180,360,5,2);
line(295,100,295,80);
line(305,100,305,86);
arc(300,80,90,180,5);
putpixel(306,85,15);
putpixel(307,84,15);
line(308,84,630,84);
line(300,75,303,75);
line(314,75,630,75);
putpixel(304,74,15);
putpixel(305,73,15);
line(306,72,306,65);
line(311,72,311,65);
putpixel(312,73,15);
putpixel(313,74,15);
pieslice(309,62,0,360,5);

line(0,300,600,300);
for(i=0;i<4;i++)
{ line(297+i,103,297+i,300);
}
for(i=1;i<100;i++)
{
//
setcolor(1);
ellipse(300,300-i,180,360,4,2);
delay(50);
setcolor(1);
fillellipse(300,300-i,49,25);
delay(50);
}
for(i=0;i<101;i++)
{
setcolor(9);
ellipse(300,198+i,0,360,53,25);
setcolor(15);
ellipse(300,200,0,360,50,25);
ellipse(300,300,0,360,50,25);
line(250,200,250,300);
line(350,200,350,300);
delay(50);

}
for(i=0;i<50;i++)
{
setcolor(9);
ellipse(300,301,180,360,50+i,25+i);
delay(50) ;
}
getch();
}

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How to format a USB pen drive in linux

The command line procedure for formating the pendrive follows…

1. $ fdisk -l

this command shows the available partitions along with the mounted drives as a list. Identify your pendrive from the list with care. Any change in drive will make your smile little tough.

2. $ mkfs.ext3 /dev/sda or $ mkfs.vfat /dev/sda1

The second command can be used when u need to partition your USB pen as VFAT/FAT32 file system

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Restore Ubuntu After Windows Installation

Do you have a Live cd with you…? Pick one and read the post…

While installing windows after the linux it will overwrite the grub boot loader , So You cannot access Linux partition after Windows Installation.
What u need to recover your system from this problem is Ubuntu LiveCD

First you have to boot your system with a ubuntu LIVECD

Then Open a terminal ( Applications –> Accessories –> Terminal)

Now you can start typing

$ sudo grub

this will give you a new prompt to edit the grub.

Type the command

> find /boot/grub/stage1

This will give you a output like (hd0,2). This will vary depends on your system

> root(hd0,2)

( use your hd number and there is no space between root and (hd0,2)

now type

> setup (hd0,2)

then

> quit

Now you can restart your system…. Ur grub will be ready…. to load ur Ubuntu and windows chain loader

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Google SMS Channels: Send SMS Text Messages to your Group for Free

Google smsGoogle India has just introduced a free SMS service called Google SMS Channels that lets you subscribe to news alerts, blog updates and other kinds of information like horoscopes, jokes, stocks or even cricket scores via SMS text messages. You don’t pay anything to send or receive SMS messages using Google SMS Channels.

Google SMS Channels, which seems to have lot in common with SMS Gupshup, is free both for content publishers as well as mobile phone users who subscribe to text updates via SMS.

Families or friends can create private SMS groups on Google SMS channels and stay in touch via SMS without paying any fees to their mobile carrier.

Other than receiving blog RSS feeds via SMS, you may also use the Google SMS service to get news alerts and weather information on your phone.

Another interesting part – you don’t really need a mobile phone to send an SMS to your group as there’s an option in Google SMS channels that lets you can compose and send SMS messages via the web itself. It supports English, Hindi, Telugu, Tamil, Malayalam and Kannada.

Google SMS channels currently works only with with phone numbers of India but they are “working towards making this service available to international numbers.” Thanks Amit Somani.

To search for an SMS channel from the mobile phone, just SMS ‘SEARCH ‘ to 9870807070.

To unsubscribe to an SMS channel from the phone, SMS ‘OFF ‘, to 9870807070 where is the name of the channel.

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Intel’s 8085 : some facts

• Introduced in March 1976

• Clock rate 5 MHz

• 0.37 MIPS

• Bus Width 8 bits data, 16 bits address

• Depletion load NMOS logic

• Number of Transistors 6,500 at 3 µm

• Binary compatible downwards with the 8080.

• Used in Toledo scale. Also was used as a computer peripheral controller – modems, harddisks, printers, etc…

• CMOS 80C85 in Mars Sojourner, Radio Shack Model 100 portable.

• High level of integration, operating for the first time on a single 5 volt power supply, from 12 volts previously. Also featured serial I/O,3 maskable interrupts,1 Non-maskable interrupt,1 externally expandable interrupt w/[8259],status,DMA.

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Bressenham’s Line Drawing Algorithm

computer graphics program using C to implement Bressenham's line drawing algorithm

#include"stdio.h"
#include"conio.h"
#include"graphics.h"
#include"math.h"

void swap(int &x,int &y)
{
int k=x;
x=y;
y=k;
}

void main()
{
int gd=DETECT,gm=DETECT,x1,x2,y1,y2,dx,dy,p,k;
float m=0;

clrscr();

printf(“Enter the sarting point x1 & y1n”);
scanf(“%d%d”,&x1,&y1);

printf(“Enter the end point x2 & y2n”);
scanf(“%d%d”,&x2,&y2);

dx=abs(x2-x1);
dy=abs(y2-y1);
m=(float)(y2-y1)/(x2-x1);

initgraph(&gd,&gm,”");
cleardevice();

if(fabs(m)>1)
{
swap(x1,y1);
swap(x2,y2);
swap(dx,dy);
}

if((x1>x2))
{
x1=x2;
y1=y2;
}
p=2*dy-dx;
for(k=0;k<0) p="p+2*dy;" p="p+(2*dy)-(2*dx);">

getch();
}

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Hacking the password of Ubuntu

If you've ever forgotten your password, you aren't alone it's probably one of the most common tech support problems I've encountered over the years.Luckily if you are using Ubuntu they made it incredibly easy to reset your password.

All it takes is adjusting the boot parameters slightly and typing a command or two, but we'll walk you through it.


Resetting your Ubuntu Password

Reboot your computer, and then as soon as you see the GRUB Loading screen,
make sure to hit the ESC key so that you can get to the menu.

Root Shell Method

Here we are going to manually edit the grub options to allow for a root shell. First you want to make sure to choose the regular boot kernel that you use (typically just the default one), and then use the "e" key to choose to edit that boot option.

Now just hit the down arrow key over to the "kernel" option, and then use the "e" key to switch to edit mode for the kernel option.

You'll be presented with a screen that looks very similar to this one:

Remove the "ro quiet splash" part with the backspace key, and then add
this onto the end:

rw init=/bin/bash

Once you hit enter after adjusting the kernel line, you'll need to use the B key to choose to boot with that option.

At this point the system should boot up very quickly to a command prompt.

Changing the Actual Password

You can use the following command to reset your password:

passwd

For example my username being user I used this command:

passwd user

After changing your password, use the following commands to reboot

your system. (The sync command makes sure to write out data to the

disk before rebooting).

sync

reboot -f

The -f parameter is necessary to get the reboot

command to work for some reason. You could always hardware

reset instead, but make sure to use the sync command first.

And now you should be able to login without any issues.

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