Ubuntu Software Center is a one-stop shop for installing and removing software on your computer. It is included in Ubuntu 9.10 and later.
Launching Ubuntu Software Center
In Ubuntu 9.10, 10.04, 10.10, and 11.04 (Classic environment):
- Open the “Applications” menu. Ubuntu Software Center is at the bottom.
In Ubuntu 11.04 (Unity environment) and Ubuntu 11.10:
- Ubuntu Software Center is in the Launcher.
- If it has been removed from the Launcher, you can find it by clicking the Ubuntu button, then “More Apps”, then “Installed — See more results”, then scrolling down.
- Alternatively, search for “software” in the Dash search field.
The interface is simple and easy to work with, especially once you know how to navigate around. Lets break down the different sections...
- This is the main area of USC. When first launched, the different categories for applications are shown. Users can simply click one of these icons, and a list of applications in that category will fill this area. The “Featured Applications” option displays several applications that are popular throughout the Ubuntu community. Most of the interaction occurs here.
- When the left pane is expanded, you are provided with the different sources of software currently available. Initially, only the “Provided by Ubuntu” and “Canonical Partners” sub-options are present. If you add any PPAs (Personal Package Archives), they will appear here as well. Clicking any of these sources will filter the software shown in the main window so it only shows applications in that repository. The “Installed Software” option also displays all of the applications currently installed on your system, making it easy to go through and remove software you no longer use.
- This top area is used to navigate. The left and right arrows function similarly to the arrows in a web browser: the left area will bring you to the previous screen, the right arrow will bring you forward a screen. Next to the arrows is a bread-crumb navigation bar. As you navigate through menus, this bar will allow you to easily switch between different sections faster than using the arrows. The search bar can be used to find an application more quickly.
- Finally, up top are your standard menus: File, Edit, View, and Help.
Now to figure out how to use Ubuntu Software Center for its main purpose: installing applications! In order to do so, you must first find the application that you want to install. If you do not know the exact program, you can look in the different categories to find what you are looking for. Many categories have subcategories to make this easier. For example, the Graphics section has the following subcategories:
Clicking on a subcategory will further filter the list of applications, making it easier to find what you are looking for. However, if you know the name of the application, then you can type it into the search box and it should show up for you:
Next, you highlight the application's listing. If the application is not already installed on your system, you will see two buttons: “More Info” and “Install.” Clicking “More Info” brings up a window that provides a detailed description of the application, along with a screen-shot in many cases:
Either from the application's details, or from the previous list of applications, users have the option to click “Install.” Doing so will ask for your system's password and then install the software. When installing, an option will be displayed in the left pane allowing you to see the progress of the installation:
Note: You may notice that the “Install” button on the applications description page also says that the software is Free. Later on, the developers plan to add a way for users to purchase software, so this is displayed to show how much the software costs.
In the event that you want to install multiple programs at once, you can select to Install each application one at a time and they will be added to a queue. After a program is successfully installed, Ubuntu Software Center will automatically move on to the next application in the queue.
After the progress bar finishes, the application will be available on your system!
To reinstall purchases that you made in a previous Ubuntu installation:
- From the “File” menu, choose “Reinstall Previous Purchases”.
- If prompted, sign in to your Ubuntu Single Sign-On account.
- Select a title, click it, and click “More Info”.
- Click “Install”.
If this does not work, there is also a fallback method:
Go to https://software-center.ubuntu.com/subscriptions/ in your favorite web browser.
- Click a title.
- Copy the “deb https...” line and add it to your system's software sources. There are a couple ways to do this:
- - Command line:
- Start a terminal. b. Obtain root privileges by running 'sudo bash'. c. Using your favorite text editor, paste the deb line (as one line) at the end of a file called /etc/apt/sources.list d. Run "apt-get update".
- Run update-manager, or invoke it from the software update icon at the top of the screen. b. Click "Settings...", and enter your password. c. Click "Other Software". d. Click "Add..." e. Paste the deb line into the dialog box. f. Click "Add Source". g. Click "Close". h. If prompted, click "Reload".
- Close Update Manager.
- - Command line:
- Install the software, using synaptic (GUI) or apt-get (command line).
If you realize that there is software on your system you no longer use, Ubuntu Software Center makes it easy to remove the application. Clicking on the “Installed Software” option in the left pane will show the software currently installed on your system. If you highlight any of these programs, you will see a “Remove” button. Simply click this button, enter your password, and the application will be removed.
In the event that you want to remove multiple programs at once, you can select to Remove each application one at a time and they will be added to a queue. After a program is successfully removed, Ubuntu Software Center will automatically move on to the next application in the queue.
Managing software sources
Ubuntu provides users with a lot of great software by default in the official Ubuntu repository, but sometimes users want more options. True to the nature of Linux, Ubuntu users are able to access a variety of repositories, allowing for many different options for programs. Thankfully, the Software Center now supports the management of repositories, including PPAs (Personal Package Archives). In order to edit the repositories that your system has access to, go to Edit > Software Sources. This will bring up the Software Sources window, which is also accessible through System > Administration > Software Sources. Here, users can select what official repositories they would like to access, and what PPAs they use:
Check the repositories you would like Ubuntu Software Center to use, close the window, then allow it to refresh. Once you do, the applications available in the repositories you selected will now show up when you search through categories or by using the search bar.
A good general procedure not only for Ubuntu Software Centre is
1 - start up the computer
2 - run the commands
sudo apt-get clean sudo apt-get update sudo apt-get upgrade
3 - if there are still problems, also run
sudo dpkg --configure -a sudo apt-get install -f