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Archives For November 30, 1999

How to Change the Number of Workspaces in Ubuntu

Last updated: July 26, 2013

This simple tutorial shows how to reduce / increase the number of workspaces on Ubuntu 12.04, 12.10, 13.04 and upcoming 13.10 Unity Desktop.

6 number of workspaces

There are quite a few Ubuntu configuration tools that allow to manage number of workspaces on Unity Desktop, such as Ubuntu Tweak, Unity Tweak Tool, Unsettings, CompizConfig Settings Manager, etc.

NOTE: For Ubuntu 13.04 and higher, you may first enable workspaces from System Settings -> Appearances -> Behavior tab -> Enable Workspaces.

To change number of workspaces via Ubuntu Tweak:

Ubuntu Tweak is very popular Ubuntu Configuration tool which was started in 2008. The first supported release is Ubuntu 7.10 Gutsy Gibbon.

To install Ubuntu Tweak, first download the .deb file from launchpad.net/ubuntu-tweak. Or use below command to download it (Press Ctrl+Alt+T to open terminal for running commands):

cd ~/Downloads/ && wget https://launchpad.net/ubuntu-tweak/0.8.x/0.8.5/+download/ubuntu-tweak_0.8.5-1_all.deb

To install Ubuntu Tweak, run:

sudo dpkg -i ~/Downloads/ubuntu-tweak_*.deb; sudo apt-get -f install

Once installed, open the tool and navigate to Tweaks -> Workspace. Change the value of horizontal and vertical workspace and that’s it!

number of workspaces via ubuntu tweak

To change number of workspaces via Unity Tweak Tool:

Unity Tweak Tool is a settings manager for Unity Desktop. It has a user friendly GUI. If you’re running on Ubuntu 13.04 Raring and higher, this can be a good way to add or remove virtual workspaces. Because Unity Tweak Tool is available in Ubuntu Software Center by default. You can click the link below to launcher USC and install it.

Install Unity Tweak Tool

Once installed, open it. Under Window Manager click Workspace Settings. Then you’ll be able to change the number of workspaces:

number of workspaces tweak tool

Use CompizConfig Settings Manager to Change number of Workspaces:

Compiz is a compositing window manager for the X Window System. It’s the default in Ubuntu system. CompizConfig Settings Manager (CCSM) is the GUI tool for configuring Compiz effects.

To install CCSM, click link below to launch Ubuntu Software Center and click install button.

install CCSM

Once installed, open it from Unity Dash. Navigate to General -> General Options -> Desktop size tab, there you’ll see the options to change number of horizontal and vertical workspaces.

number of workspaces CCSM

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Install Midori 0.5.4 from PPA in Ubuntu 13.10, 13.04, 12.04

Last updated: July 26, 2013

This tutorial shows you how to install the latest Midori (0.5.4) from Midori PPA on Ubuntu 13.10 Saucy, 13.04 Raring, 12.04 Precise and also 12.10 Quantal.

midori 0.5.4

Midori is a lightweight, fast, and free web browser. It is also the default browser of the beautiful elementary os. Midori is release under the GNU Lesser General Public License, version 2.1, which makes it suitable for inclusion in both proprietary and free, open-source programs.

Highlights in Midori 0.5.4:

  • Error pages are looking quite a bit nicer now and also try to be more informative.
  • Bookmarks are also improving at an increasing pace thanks to André. Several bigger changes are already in the pipeline for the next cycle.
  • Glib 2.23.3, GTK+ 2.24, Vala 0.16.0 and WebKit 1.8.3 are required now.

Install Midori:

The Midori PPA contains the latest packages for Ubuntu 13.10 Saucy, 13.04 Raring, 12.10 Quantal, and 12.04 Precise.

To add the ppa, press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below commands:

sudo add-apt-repository ppa:midori/ppa

add midori ppa

Then update system package lists and install the browser via commands:

sudo apt-get update; sudo apt-get install midori

install midori

midiro in unity dash

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Install / Upgrade LibreOffice 4.1 in Ubuntu 13.04, 12.04 via PPA

Last updated: August 2, 2013

LibreOffice 4.1 has been officially released. It’s available for Ubuntu 13.04 Raring and 12.04 Precise users from the main LibreOffice PPA repository.

LibreOffice 4.1 main window

LibreOffice 4.1 features a large number of improvements in the area of document compatibility, which increases the opportunities of sharing knowledge with users of proprietary software while retaining the original layout and contents.

New Features:

  • Rotate images in Writer in 90 degree increments
  • Writer, Calc and Impress now allow embedding fonts in their documents.
  • It is now easy to include a series of photos in Impress with the “Photo Album” feature.
  • Add a Stepped Lines line type to Line and XY (Scatter) graphs
  • Especially for migrations, LibreOffice adds a number of significant improvements of interoperability with MS Office formats.
  • A very large number of bugs have been fixed
  • More.

Install LibreOffice 4.1

Press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below commands to add the LibreOffice Main repository.

sudo add-apt-repository ppa:libreoffice/libreoffice-4-1

After that, update your package lists and install the office suit. To do so, run below command:

sudo apt-get update; sudo apt-get install libreoffice

LibreOffice 4.1 about

Now you can start LibreOffice 4.1 from the Unity Dash. Enjoy!

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Kernel 3.10.3 Released: Install in Ubuntu 13.04, 12.04, 12.10

Last updated: July 26, 2013

This latest stable Kernel 3.10.3 has been released. All users of the 3.10 kernel series are urged to upgrade as soon as possible. This tutorial shows how to install / Upgrade Kernel 3.10.3 for Ubuntu 13.04, 12.04, 12.10 and Linux Mint users.

Linux Kernel 3.10.3

Linux Kernel 3.10.3 is a small release that includes a lot of small changes. The mainline Kernel PPA has updated DEB packages for Ubuntu / Debian users. Read full list of changes at LKML

Install / Upgrade Kernel 3.10.3

Press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below commands to downloads Debs.

For 32-bit system:

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10.3-saucy/linux-headers-3.10.3-031003-generic_3.10.3-031003.201307251835_i386.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10.3-saucy/linux-headers-3.10.3-031003_3.10.3-031003.201307251835_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10.3-saucy/linux-image-3.10.3-031003-generic_3.10.3-031003.201307251835_i386.deb

For 64-bit system:

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10.3-saucy/linux-headers-3.10.3-031003-generic_3.10.3-031003.201307251835_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10.3-saucy/linux-headers-3.10.3-031003_3.10.3-031003.201307251835_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10.3-saucy/linux-image-3.10.3-031003-generic_3.10.3-031003.201307251835_amd64.deb

After that, both 32-bit and 64-bit use below command to install the kernel:

sudo dpkg -i linux-headers-3.10.3*.deb linux-image-3.10.3*.deb

To apply changes, run:

sudo update-grub

(Optional) To remove this kernel, run below command in terminal:

sudo apt-get purge linux-image-3.10.3*
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Jupiter is available for Ubuntu 13.04 from JoliCloud PPA Repository

Last updated: July 26, 2013

As you may know, Jupiter is a powerful and lightweight power and hardware control applet. It has been retired and last supported release is up to Ubuntu 12.10 Quantal. However, Jupiter is available for Ubuntu 13.04 from JoliCloud Desktop Environment PPA.

Jupiter on Ubuntu 13.04

The webupd8team add the packages to the ppa and it’ll be used as a background program for JoliCloud session. I’ve installed it on my laptop and it’s working well.

Install Jupiter on Ubuntu 13.04:

Note that don’t install it on a product machine. Use it as your own risk!

Press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below command to add the PPA repository:

sudo add-apt-repository ppa:jolicloud-team/ppa

Then update package lists and install:

sudo apt-get update; sudo apt-get install jupiter

To install Jupiter support package for Eee PCs:

sudo apt-get install jupiter-support-eee

jupiter ubuntu 13.04 unity

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Install JoliCloud Desktop on Ubuntu 12.04 / 13.04 via PPA

Last updated: July 25, 2013

The JoliCloud Desktop Environment finally is available for Ubuntu 12.04 Precise, 13.04 Raring and 12.10 Quantal. Here’s how to install it via ppa repository.

jolicloud ubuntu

As you may know, JoliCloud Desktop Environment puts a HTML5 launcher with shortcuts to popular websites and services front and center, such as Facebook, Twitter, Gmail, Wikidedia, Angry birds, and more.

Install JoliCloud Desktop

To get started, press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below command to add the JoliCloud official ppa repository:

sudo add-apt-repository ppa:jolicloud-team/ppa

add jolicloud desktop ppa

After that, update the package lists to make it avaiable and finally install the session. To do so, run below command:

sudo apt-get update; sudo apt-get install jolicloud-desktop-environment

install jolicloud ubuntu

Once installed, log out current session. Click on the gear icon and choose Jolicloud for Ubuntu login.

jolicloud unity login

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How to Install Komodo Edit on Ubuntu 13.04, 12.04, 12.10

Last updated: July 25, 2013

This simple tutorial shows how to install latest Komodo edit on Ubuntu 13.04 Raring, 12.10 Quantal, 12.04 Precise via ppa repository.

komodo ubuntu

Komodo Edit, based on the award-winning Komodo IDE, offers sophisticated support for all major scripting languages, including in-depth autocomplete and calltips, multi-language file support, syntax coloring and syntax checking, Vi emulation, Emacs key bindings. It provides dynamic language expertise for Perl, PHP, Python, Ruby, and Tcl, plus JavaScript, CSS, HTML, and XML, and template languages like RHTML, Template-Toolkit, HTML-Smarty and Django.

Install Komodo Edit

A PPA repository has been created for Ubuntu users. So far it supports Ubuntu 13.04, 12.04 and 12.10.

To add the repository, press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below commands:

sudo add-apt-repository ppa:mystic-mirage/komodo-edit

After that, update your package lists and install this tool via command below:

sudo apt-get update; sudo apt-get install komodo-edit

Once installed, open it by running komodo command. You may need to manually create launcher shortcut

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How to Set Static IP Address on Ubuntu 13.04 (both Wireless & Wired)

Last updated: July 25, 2013

This is a picture guide for beginners to set static IP address on Ubuntu 13.04 Raring Ringtail, both wireless and wired connection.

Ubuntu by default uses DHCP (Dynamic Host Configuration Protocol) to obtain IP address when your computer is connected to a network. You may required to change to static IP address in some network environments. This tutorial will show you how to do this step by step.

Tutorial Objectives:

  • Setup Static IP Address in Ubuntu 13.04 (both wireless & wired)
  • Enjoy!

To get started, move your cursor to top-right corner network icon on panel. Click to expand the menu and choose Edit Connections…

edit network to static ip

In next window, choose your wired connection or wifi network then click Edit button.

choose network connection

Then navigate to IPv4 Settings tab. Switch Method to “Manual” from the drop-down box. Click Add button and type in IP address, netmask and gateway. Finally click “Save” when everything’s done.

static ip address

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Install RawTherapee 4.0.11 on Ubuntu 13.04, 12.04, 12.10

Last updated: September 11, 2019

This simple tutorial shows you how to install the latest RawTherapee 4.0.11 on Ubuntu 13.04 Raring, 12.10 Quantal, 12.04 Precise using PPA repository.

RawTherapee main window

RawTherapee is a cross-platform raw image processing program written in C++, using a GTK+ front-end and a patched version of dcraw for reading raw files. It is notable for the advanced control it gives the user over the demosaicing and developing process.

“The 4.0.11 release includes a number of new features which you can read about below, but just as importantly it contains a large number of speed improvements and bug fixes, so we recommend you update straight away!”

New features:

  • CIECAM02 “Adaptation scene luminosity” now calculated automatically
  • CIECAM02 hot/bad pixel fixer to prevent bright pixels from appearing
  • The Defringe tool is now able to target a range of specific colors without touching others
  • New bundled processing profiles
  • New keyboard shortcuts to apply rank and color labels and a new direct popup menu for color labels, all in the File Browser
  • “Profile Fill Mode” button controls whether to replace missing processing profile values with default ones or not
  • Keyboard shortcuts to open the next/previous image and to synchronize the File Browser strip with the currently opened image
  • New demosaicing algorithms for noisy photos:
    • LMMSE
    • IGV
  • More zoom levels
  • Redesigned save window
  • New functionality of the minima/maxima control points curves editor, see the RawTherapee Manual
  • Support for TIFFfiles with alpha channels
  • Support for 32-bit TIFF files (HDR)
  • Preferences/Batch processing options: all to ‘Add’ and all to ‘Set’
  • Support for
    • Nikon D5200
    • Nikon D7100
    • Nikon COOLPIX A
    • Panasonic Lumix DMC-G5

Install RawTherapee:

The latest release is available for Ubuntu 13.04 Raring, 12.10 Quantal, Ubuntu 12.04 Precise from the ppa repository.

To add the ppa, press Ctrl+Alt+T on your keyboard to open a terminal window. When it opens, run below command:

sudo add-apt-repository ppa:dhor/myway

Then update package lists and install via Synaptic Package Manager. Or you can run below command instead:

sudo apt-get update; sudo apt-get install rawtherapee

RawTherapee unity dash

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DiffImg: Simple Image Comparison Tool for Ubuntu Linux

Last updated: July 24, 2013

DiffImg is a simple image comparison tool which take two images with the same size as input. Some statitics are computed and the positions where pixel differ are displayed as a color mask.

diffimag image comparison tool

There are very few image difference tools for Ubuntu Linux. DiffImg is one of them which has a user friendly GUI. It uses OpenCV as backend so it can read and compare 8/16/24/32 bits images without problem but only single channel and RGB image has been take into account, so alpha channel isn’t supported.

Because DiffImg is written with Qt, it runs on Windows and Linux (MacOSX isn’t tested yet) and OS/2. It can read basic formats as BMP, PNG, JPG but also Tiff and OpenExR.

Current Features:

  • Image difference display : a yellow/red mask can overlay the original/modified images.
  • Single/Dual panels mode.
  • Statistic computation: Mean error, RMS error and min/max are computed.
  • Several metrics can be used for computing image difference.
  • Histogram of error.
  • “Slideshow” : DiffImg can compare directory of image, so you can switch to the previous/next comparison if you have two folders with the same image list.
  • Supported files :DifffImg uses Qt plugins to load images, so by default it can read basic formats as BMP, PNG, JPG and OpenCV supported formats (Tiff, OpenExR).
  • Basic batch mode

Install DiffImg:

A PPA repository has been created to make it easy to install for Ubuntu and Linux Mint users. So far, it supports Ubuntu 13.04 Raring, 12.10 Quantal, 12.04 Precise and Linux Mint 13 Maya, 14 Nadia, 15 Olivia.

To add the ppa, press Ctrl+Alt+T on your keyboard to open terminal. When it opens, run below commands:

sudo add-apt-repository ppa:dhor/myway

Then you can update package lists and install the tool via Synaptic Package Manager, or run below command:

sudo apt-get update; sudo apt-get install diffimg

That’s it.

For other systems, Diffimg source code and exe file can be download from SourceForge.

diffimg on ubuntu unity

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