Ubuntu: How to download a missing GPG key

Here is the tutorials for how to download and add the gpg authentication key in software sources. It is easy and simple way.

Just download and install from the following links

For 10.04

Launchpad-getkeys

For 9.10

Launchpad-getkeys



For execute the programme type the following in terminal

sudo launchpad-getkeys

Now the missing authentication keys are installed. For verify the key go to

System->administration->software source->authentication


From the above picture, all the keys are installed correctly.

Ubuntu: Installing K3B burning application

To day I try to write a cd via brasero burning application. But some bugs are shown in the screen.


Toc2cue and cdrdao are missing and ask install manually. Cdrdao is found in synaptic package manager and other toc2cue is not found in anywhere.

So I install K3B, found in ubuntu software centre.


Now go to Applications->Sound & video->K3B




The K3B is open source and free to use look like a commercial burning application.

Now copy from cd and create image then wirte to another cd is very easy and fast





Some other features of K3B

1.Ripping cd
2.Ripping dvd

Ubuntu: UCC (ubuntu control centre) a administration tool

Ubuntu control centre (UCC) is a simple and centralised control centre for controlling all computer system. Control centre is a default ubuntu package in ubuntu. But this UCC is containing more third party programmes like font manager,hard info ,etc.,

First download the font manager and install it. Then download UCC and install the programme.

Now go to Applications->System Tools->ucc


Software Management


Hardware



Networks and internet


System



Local Disks


Personal Settings

Ubuntu: How to set up desktop wallpaper slideshow

Here tutorials for how to set up wallpaper slideshow.

Download the script and extrat here

Now right click on wallpaper, a nice slideshow in desktop is shown.


The press run button the following windown is open


Select picture folder, picture duration in minutes,sec,hrs and press ok

Ubuntu: How to install linuxmint main menu in ubuntu

Linux mint is a another linux operating system based on ubuntu. Now here tutorial for how to install linuxmint main menu in ubuntu.

First, add the following PPA in software source.

Type the following in the terminal.

sudo add-apt-repository ppa:webupd8team/mintmenu && sudo apt-get update

Then

sudo apt-get install mintmenu

The linuxmint maint menu is installed. The right click on top panel select 'Add to panel'->search and select mintmenu


Now in top panel


Left click on mintmenu the menu is opened



In this menu, operate the all applications, like firefox,thunderbird etc.,

Ubutu: How to install skype via repository

Skype is a proprietary software to allow make calls from pc to phone over internet. For installing the skype add the following in software sources,

In terminal

sudo gedit /etc/apt/sources.list

After open the file add the following line

deb http://download.skype.com/linux/repos/debian/ stable non-free

Save and exit.

In terminal For authentication key type the following.

sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 0xd66b746e

Then

sudo apt-get update

sudo apt-get install skype

Now the voip programme skype is installed in ubutnu.

Go to System->Administration->Software sources->Other software



For authentication key

Ubuntu: How to see the logged users, username with date/time

This is shell script for logged users, our username with logged date/time.

Open a text file in terminal

sudo gedit logged.sh

copy and paste the following lines

#!/bin/bash
# Write a shell script called hello which output the following:
# + Your username
# + The time and date
# + Who is logged on
# + also output a line of asterices (*******) after each section

# function to display a line of asterices
function line(){
echo "*************************************************"
}

echo "Your username : $(echo $USER)"
line # call function

echo "Current date and time : $(date)"
line

echo "Currently logged on users:"
who
line

Then save and exit

In terminal type the following command

sudo chmod +x logged.sh

./logged.sh

The out put is

Ubuntu: Tutorials for see the contents of deb file

Now the tutorials for How to see the contents of deb file in ubuntu

First install the programme called 'apt-file', type the following command in terminal

sudo apt-get update && sudo apt-get install apt-file

For resynchronise the package source, type the following in terminal

sudo apt-file update

Now see the contents of deb file/package

sudo apt-file list packagename # This is syntax for the command

sudo apt-file file wget



Then see the contents of package vlc

sudo apt-file list vlc


How can see the deb file for example 'cndrvcups-capt_2.00-2_i386.deb' type the following in terminal

sudo dpkg-deb -c cndr*.deb

The output is

Ubuntu: A script for install multimedia codecs and VLC

Here is the script for install multimedia codecs (ubuntu restricted extras) and vlc without internet connection.

Download the ubuntu restricted extras

Download link from here

Alternative link from here


Secondly VLC multimedia player is most valuable player. It is a open source and source can be available at http://videolan.org

Now download the VLC offline installer.

Download link from here

Alternative download link here

Now download the archieve files and extract at desired folder. Then run the script install.sh, the codes are installed.

Ubuntu: How to convert from/to mp3,ogg,flac,aac

Here is the tutorial for how to convert from/to ogg,mp3,flac,aac file formats.

First install the programmes zenity,ffmpeg

sudo apt-get install zenity ffmpeg

Then download the script called easyconverter.sh

wget http://raymii.org/cms/content/downloads/easyconverter.sh

sudo chmod +x easyconverter.sh

./easyconverter.sh




Press 'ok' the programme is starting to convert the files


Select type of files to be converted then press ok and select the folder, contaings mp3 songs



Press ok


Then select type of output file and press ok



Select quality of songs from the following screen




Press ok



Press Lets Rock Baby button


After conversion


For opening the folder press yes,open it


Free formats are ready to play

Ubuntu: How to synchronisation tom boy notes with ubuntu one

Here, I explain the how to synchronisation tom boy notes with ubuntu one and update every 10 minutes.

First go to

Applications->accessories->tom boy notes. The icon for tom boy notes is appeared in top panel


Then in top panel press the right click on tomboy note icon and select preferences->synchronisation.



Select service->Tomboy web
server->https://one.ubuntu.com and press connect to server.Tik the 'automotically sync in background every' and set the time for 10 minutes. This feature is used for the tom boy notes automatically updated to ubuntu one server.




If you have a ubuntu one account, give the username and password, otherwise please create the account.

If server connected



Press Add this computer then

Now press the right click on tomboy icone in top panel



Select preferences->synchronisation and then press 'Yes' the tomboy notes starting update in ubuntu one.



Now our account in ubuntu one, the notes are shown .