How to change login screen

open Terminal and type

sudo cp -f /usr/share/applications/gnome-appearence-properties.desktop /usr/share/gdm/autostart/LoginWindow/

then logoff. you can get a properties window on the login screen.

Windows mobile sync with Ubuntu

click here

JAVA CLASSPATH SETTING IN UBUNTU

sudo gedit etc/environment

enter your password

PATH=".:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" (already exist)
just add below two lines

here i am using java6

JAVA_HOME="/usr/lib/jvm/java-6-openjdk"

CLASSPATH=".:/usr/lib/jvm/java-6-openjdk/lib"


save that file.

2) REINSTALLING GRUB 2 AFTER WINDOW INSTALLING

After reinstalling Windows in the computer dual boot with both Windows and Ubuntu Linux,you need restore grub because mbr has been rewritten.This tutorial shows how to restore grub 2.

Update:Today I ghost my XP system,but after restore grub,I cannot boot into XP by clicking the old windows option in grub menu.So you’d better to run this command to renew the grub2 boot list after trying following method:

sudo update-grub

1).Using grub4dos
First download grub4dos from here.
1. For XP user,copy the file “grldr”(without quotes) from grub4dos package to C:\.Edit boot.ini (hidden file in C:\) and add this line to the file:

c:\grldr="grub4dos"

For Vista/win7 user,copy the file “grldr”,”grldr.mbr” to C:\.Create boot.ini file in the root directory of C:,copy and paste following into this file.

[boot loader]
timeout=0
default=c:\grldr.mbr
[operating systems]
C:\grldr.mbr="Grub4Dos"

2. Now,create menu.lst in root directory of C:,its content:

timeout 0
default 0
title grub2
find --set-root /boot/grub/core.img
kernel /boot/grub/core.img
boot

Restart computer,and select boot from Grub4Dos.Then select boot up Ubuntu in grub menu.
Once login,use this command to install grub into mbr:

sudo grub-install /dev/sda

2).Using Ubuntu 9.10 livecd or higher
Here assuming the Ubuntu partition is sda7,and /boot partition is sda6 (if you have a separate /boot partition).
Boot up ubuntu from the livecd,open terminal and run:

sudo -i
mount /dev/sda7 /mnt
mount /dev/sda6 /mnt/boot  #skip this one if not have a separate /boot partition
grub-install --root-directory=/mnt/ /dev/sda

If you miss “grub.cfg” file,use following to recreate:

mount --bind /proc /mnt/proc
mount --bind /dev /mnt/dev
mount --bind /sys /mnt/sys
chroot /mnt update-grub
umount /mnt/sys
umount /mnt/dev
umount /mnt/proc
exit

3).Using the cd/usb boot up with grub
Boot up the cd/usb,press c in grub menu.Type:

grub>find /boot/grub/core.img
grub>root (hdx,y)   (previous command will output the x,y)
grub>kernel /boot/grub/core.img
grub>boot

After the boot command,you’ll go into grub2 menu.Select to boot up ubuntu,and run this command to restore grub:

sudo grub-install /dev/sda

REINSTALLING GRUB 2 AFTER WINDOW INSTALLING

Insert ubuntu CD

Select "Try ubuntu without any change to current system" option

Open Accessories >terminal

Type: sudo fdisk -l

This command will list all partions in hard disk
find the partion ,in my case it is sda2

sudo mount /dev/sda2 /mnt
sudo mount --bind /dev /mnt/dev
sudo chroot /mnt
update-grub
grub-install /dev/sda2
grub-install --recheck /dev/sda2
sudo umount /mnt/dev
sudo umount /mnt

Now reboot, you will find that grub only contain ubuntu
Dont panic! we are not yet done

Boot to ubuntu

Open Accessories >terminal

Type: sudo update-grub

Now reboot

Ubuntu 10.10 countdown

UBUNTU Upgrade

UBUNTU can upgrade in two ways

1) ONLINE http://www.ubuntu.com/desktop/get-ubuntu/upgrade

2) OFFLINE Download alternative ubuntu from www.ubuntu.com (for example here taking ubuntu 10.04)

then open terminal and go to where the ISO file is located and type the following

sudo mount -o loop ubuntu-10.04-desktop-i386.iso /media/cdrom0 (press enter type your passwd)

after that

press ALT+f2 Box will appear in that type gksu sh /cdrom/cdromupgrade (press OK)

now upgrade will be started.

VIRUS CLEAR

We are all know about the common viruses in our System(Autorun.inf and New Folder)
For U I am uploading 2 java programs to delete them. Save them and run them.
First one,for removing autorun.inf and it's internal virus.
second one,for removing Newfolder virus.

First thing you have to read the "readme" file.Below link is available.
Below link is available.It's Zip file you have to extract it.
http://www.mediafire.com/?43vn3zznmkz
For java software click the below link
http://java.sun.com/javase/downloads/index.jsp
My suggestion is when you insert the Pendrive just run the AutoRunClear prog.