Snippet: How to Remove Repositories In Ubuntu

Damien — Thu, 27 May 2010 19:00:23 +0000

In all our previous articles, we taught you how to add repositories to your system so that you can install third party software. What about the other way round? There are times when you uninstall an application and have no more use for its repository. It is a good idea to remove the repository from your system and keep your computer spick and span.

Here’s how you can do it easily, in less than a minute:

Removing repository from the sources.list file

If you have previously added the repository via the sources.list file, the best way to remove the repository is to remove the respective line from your sources.list file.

Open your sources.list file

gksu gedit /etc/apt/sources.list

Scroll down to the repository that you want to remove.

Delete the line of code.

Save the file and exit.

Update your system:

sudo apt-get update

Done!

Removing repository from Synaptic Package Manager

If you have used the command ‘add-apt-repository’ to add repository to your system, you will not be able to find the line in your sources.list file. In such case, you might want to remove your repository via the Synaptic Package Manager.

Open Synaptic Package Manager (System -> Administration -> Synaptic Package Manager)

In the menu, go to Settings -> Repositories. Click on the Other Software tab.

Scroll down the list till you find the repository that you want to remove. Highlight it and click the Remove button

Click Close.

When you are back to the Synaptic main screen, click the Reload button to update your system.

That’s it.

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Snippet: How to Remove Repositories In Ubuntu originally published on Make Tech Easier (RSS)
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How to Backup And Install Your Linux Applications With AptOnCD

Damien — Sat, 13 Jun 2009 12:59:04 +0000

Everytime after you have reformatted the hard disk and reinstalled the Linux distro of your choice, the one troublesome thing that you need to do is to re-download all your applications and restore all the settings. This is made worst when your wireless connection just don’t work with the newly installed distro. How are you going to download all your applications when you can’t even connect to the Internet?

APTonCD aims to solve this problem by backing up all your packages into a Cd/DVD. You can then install your applications right from the CD/DVD. If you want to save up on CD, you can even store the data as an iso file and restore your system right from the ISO file.

Here’s how it is done:

Install APTonCD

sudo apt-get install aptoncd

you can also install it via the Synaptic Package Manager.

Go to System->Adminstration->APTonCD

Backing up package

Click the Create button.

APTonCD will then scan your system for all the package that you have downloaded/installed previously.

When it is done scanning, you can then select the package that you want to backup. Click Burn to start the backup process.

Enter the destination to store the image. Depending on the size of the file, you might need to choose DVD instead of CD.

When it is done, it will prompt you to burn into a CD/DVD. Click Cancel if you only want to store it as an ISO file.

This is all you need to do for the backing up process.

Restoring the package

To restore the package (assuming you have created the CD media), simply pop in the CD/DVD. Your computer will scan the disc and prompt up a window asking if you want to restore the package. Click Yes. Once that’s done, you will be able to install applications from the Synaptic Package Manager (or apt-get) without Internet connection.