How to recover gnome-shell

If you found that your gnome-shell task bar missing?
And your desktop seems plain and not able to access applications menu.
You can recover your lost desktop. Follow the steps.

Apply the key combinations, Ctrl + Alt + T 
A terminal will open. Enter the following commands,

sudo su
gnome-shell --replace

You can see that, your desktop panels and menus appear again

Change grahical Ubuntu boot splash into text mode

gedit /etc/default/grub

Find the word "quiet splash".
Remove the word "quiet splash".

Save the file.

Update the grub.

update-grub

How to create Ubuntu Live CD/DVD using Remastersys [Obsoleted]

This tutorial is for creating a Live CD/DVD based on Ubuntu 12.04. You can also try latest version of Ubuntu Live CD/DVD by using the following instructions.

Step 1
Install Ubuntu 12.04 in a PC or inside a Virtual Box application.
Upgrade the system by installing latest packages, apply the following commands,

sudo su
apt-get update
apt-get upgrade

Install the additional applications (e.g. Gimp) for your Live CD/DVD.

Step 2
You can remove following packages to reduce the size of final ISO file.
 apt-get remove libreoffice-help-en-us ubuntu-docs thunderbird smbclient rhythmbox totem deja-dup gnome-orca transmission-gtk

Remove games,

sudo apt-get purge aisleriot gnome-sudoku mahjongg ace-of-penguins gnomine gbrainy


Remove the unnecessary packages deposited in cache using Bleachbit. Otherwise the size of Live DVD will be heavy. Bleachbit can remove lot of junk files and save space. Install Bleachbit using the following command,

apt-get install bleachbit

Open Bleachbit from Applications > System Tools

To use Bleachbit, see the documentation here.

Few more tips too make your Live DVD good,

Disable Apport to prevent unwanted system messages.

Open following file and fine the entry enabled=1 change to enabled=0.

sudo gedit /etc/default/apport

You can change boot splash to text mode. Open following file

gedit /etc/default/grub
 
and find following line,

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Remove the entry "quite splash", save file and close.


Step 3
Installation of Remastersys in Ubuntu 12.04. Apply the following commands.

sudo su
wget -O - http://www.remastersys.com/ubuntu/remastersys.gpg.key | apt-key add -

gedit /etc/apt/sources.list

Add the following lines in the file, save and close.

#Remastersys Precise
deb http://www.remastersys.com/ubuntu precise main

Update the package repository and install Remastersys

apt-get update
apt-get install remastersys remastersys-gtk

Remastersys will appear in Applications > System Tools > Administration
  
See the screen shots below,

Main screen of Remastersys.

You can assign a name for Live DVD.

You can export user settings to Live DVD. It means, you can assign an inbuilt user name and password for DVD.

You can click on appropriate buttons to build Live DVD. You need Internet connection to run Remastersys. Certain packages to be installed from Internet to build the Live DVD. The output will be in .iso format, you can locate it from /home/remastersys. Burn the .iso file in a DVD and boot from computer.

How to install Gnome Classic desktop in Ubuntu 12.04

Execute the following command in a terminal,

sudo apt-get install gnome-session-fallback

Log out and select Gnome Classic from login session.

How to change boot splash in to text mode

You can change Ubuntu traditional graphical boot splash into text mode. See the following commands,

gedit /etc/default/grub

Find the following line,

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Delete the words "quiet splash" . See the modified line below,

GRUB_CMDLINE_LINUX_DEFAULT=""

Then update the Grub,

sudo update-grub

Madbox Linux: super fast Linux

You want a super fast Linux?

You can download and use Madbox Linux.

Madvox is build on Ubuntu 12.04 and OpenBox desktop.

Information
Base : Ubuntu precise (development branch) 12.04
Kernel : 3.2.0-20
Window Manager : Openbox 3.5.0


Applications:
 Accessories : lxterminal, lxpanel, pcmanfm, geany
 Multimedia : mirage, gnome-mplayer, pavucontrol
 Web : chromium
 System : gparted, htop, ..

List all entries in Startup Applications menu in Ubuntu 12.04

In normal case, entries in Startup Applications in Ubuntu 12.04 does not display.
You can enable all the entries by applying following commands in a terminal,

cd /etc/xdg/autostart/
sudo sed --in-place 's/NoDisplay=true/NoDisplay=false/g' *.desktop

How to install minimal gnome-shell

Execute the following command in a terminal,

sudo apt-get --no-install-recommends install gnome-shell

Installation of minimal gnome-shell is essential in the process of building live CD from scratch. 

"Not registered on network" error in Android

Follow the steps to solve this problem,

Settings > Wireless and Network settings > Mobile networks > Network operators

Select your network service provider from the list.

How to overcome Samasung Galaxy Y S5300 Pocket "Sleep of Death" problem

I recently bought Samsung Galaxy Y S5300 Pocket mobile phone. It showed the sign of "Sleep of Death" a common problem of Android phones. The sign of the disease is that phone is automatically switch off when it not in use. I went to Samsung service centre and described my problem. They re-installed the software. But problem  not solved. But I updated the OS through Wireless Internet connection and the problem solved. Following are the steps I followed:

1. Connect your Samsung Galaxy phone to Internet connection.
2. Open Settings > About Phone > Software Update > Update Check for updates
3. Allow the phone to receive update from Internet. Wait for the process complete and at last phone will automatically reboot.

My phone survived from "Sleep of Death" problem after this process. I don't know how it works in your phone. My Phone based on Android v2.3 (Gingerbread) OS. 

How to remove translation entries while apt-get update

While updating Ubuntu 12.04 repositories, you can see that it take too much time checking translation entries. You can save the time by applying following solution,

gedit /etc/apt/apt.conf.d/99translations

And add following lines and save it,

Acquire::Languages "none";

Then try apt-get update command in a Terminal.

How to install Dropbox client in Ubuntu

Dropbox is an online storage service, where you can get 2 GB initial storage space free. You can easily manage Dropbox storage service from your desktop PC by installing Dropbox client.

Steps

Create an account in Dropbox website,

Download deb file from  https://www.dropbox.com/install?os=lnx

Install Dropbox client in your Ubuntu [Right click deb file and select "Open with .

After installation, Dropbox client open and give your user name and password.

You can see Dropbox icon appeared in desktop task bar.
You can drop your files in Dropbox folder in Home folder. Then it transfer to online storage space.

Change Ubuntu windows button from Left to Right

From Ubuntu 10.04 onwards you can see applications windows button in Left side.
This is inconvenient to many users. You can change it to right side as previous versions.

Solution
Press Alt + F2. A window appears and copy paste the following command in the text space and Press Run button.

gconftool-2 --set /apps/metacity/general/button_layout --type string menu:minimize,maximize,close

You can see the change.

How to install GnomeShell in Linux Mint 13 and Ubuntu 12.04

If you like traditional desktop in Linux Mint 13 Cinnamon edition and Ubuntu 12.04, you can install GnomeShell. GNOME Shell is the core user interface of the GNOME 3 desktop environment. I installed GnomeShell when my Cinnamon desktop in Linux Mint 13 showed some problems.

How to install
Open Applications > Accessories > Terminal and apply following commands.

sudo su
apt-get install gnome-shell


After completing the installation restart PC and in login screen change the session to gnome classic.

No Internet connection in Virtual Box with Linux Mint 13

No Internet connection in my Virtual Box inside Linux Mint 13 Maya. My default networking adapter in Virtual Box was NAT. I solved the problem by changing to Bridge Adapter. Now I can access Internet in Virtual Box client OS.