Sunday, October 21, 2012
How to Get a list of Installed ‘web-apps’ and Remove them in Ubuntu 12.10?
Although it is very tempting, due to few reasons, I have decided to wait a few more months (hopefully) before I give a go at the new Ubuntu Unity’s ‘web-apps’ features. Now I did install few of these apps, but I had few glitches here and there and it doesn’t seem like the ‘web-apps’ feature is quite there yet (at least in my ‘short’ experience).
Anyhow, whether you use this feature or not, if you have installed some of these ‘web-apps’ through Firefox, then it can be a bit difficult to get rid of them later, as there is no way to get a list of currently installed ‘web-apps’ through the ‘Online Accounts’ tool (it does not show all the installed apps).
But luckily, you can use a simple trick in the Terminal window, to get a list of currently installed ‘web-apps’. And once it gives you the list, then you can use the usual ‘apt-get remove …’ command to get rid of them easily.
For that, please follow the below steps.
Step 1: Finding them.
Open your Terminal window and enter the below command.
dpkg --get-selections |grep unity-webappsThis as shown below, should give you a list of currently installed ‘web-apps’.
Note: ‘libunity-webapps0′ and ‘unity-webapps-service’ are core libraries of ‘web-apps’. So make sure not to remove them.
Step 2: Removing them.
Let’s say I wanted to get rid of the ‘Launchpad’ web-app, then I’ll use the below command.
sudo apt-get autoremove unity-webapps-launchpadYou can remove multiple ‘web-apps’ at the same time too. For that, make sure to add a ‘space’ between each package’s name, as shown below.
sudo apt-get autoremove unity-webapps-launchpad unity-webapps-youtubeAlso remember to replace these package names with the ones installed on your Ubuntu OS (of course). That’s it.
Slax 7.0 Preview
Tomáš Matějíček has announced the availability of a public preview release of Slax 7.0, a Slackware-based live CD with KDE 4 in under 180 MB: "So here it is. A small lightweight KDE, recompiled with as few dependencies as possible. I've partially completed my battle with the KDE desktop environment. There is a lot of work waiting in the queue, since there are no applications yet except Konsole; however, it is ready for wider public testing. I am convinced it was worth the effort. Both 32-bit and 64-bit variants are ready for testing. I've configured four workspaces. Try to switch between them using your mouse - simply move your mouse pointer to the very top left of the screen. No clicking needed. You should see the effect." Here is the full release announcement with screenshots. Download (MD5): slax-7.0-kde4-2012-10-20-i486.iso (177MB), slax-7.0-kde4-2012-10-20-x86_64.iso (183MB).
Ubuntu Builder 2.3.0 Adds Support For Ubuntu 12.10 Quantal Quetzal
Ubuntu Builder has been updated to version 2.3.0 recently which adds support for Ubuntu 12.10 Quantal Quetzal and at the same time drops support for Natty. Ubuntu Builder is a tool with GUI that allows users to build a customized version of their Ubuntu-based distributions. The tool allows to customize either i386 or amd64 OS images.
Here are some of the changes in this latest release:
· Added Quantal Quetzal support.
· Removed Natty Narwhal support.
. Bugfix: I get '/casper/vmlinuz not found' with customized kernel image.
· Bugfix: Lack of kernel when the kernel is updated.
· Improved log generation.
· User manual updated.
· Now depends on gambas3-gb-image (only Gambas 3 version).
Ubuntu Builder Installation
Open the terminal and install Ubuntu Builder 2.3.0 in Ubuntu 12.10/12.04 or Linux Mint 13 with the following commands:
sudo add-apt-repository ppa:f-muriana/ubuntu-builder
sudo apt-get update
sudo apt-get install ubuntu-builder
For any bug encountered, you can report it here.
Install VirtualBox 4.2.2 In Ubuntu 12.10 (Quantal Quetzal) and Linux Mint 13
VirtualBox for Linux has just been updated to version 4.2.2. This is a maintenance release that brings full support to X.Org Server 1.13 and Linux Kernel 3.7 RC1. Here are some of the key changes in this latest release:
You can find the full changelog of VirtualBox 4.2.2 here.
- Linux hosts / guests: Linux 3.7-rc1 fixes
- Linux Additions: support X.Org Server 1.13
- Linux Additions: fixed a hang when the X server was restarted with old guest kernels
- Linux Additions: fixed a VBoxService crash during CPU hot remove
VirtualBox 4.2.2 Installation
If you have an older version (4.1, 4.0, 3.2, 3.1, etc.) of VirtualBox, it is recommended that you uninstall it with these commands:
sudo apt-get purge virtualbox-4.1
To install VirtualBox 4.2.2 in Ubuntu 12.10/12.04 or Linux Mint 13, open the terminal and issue these commands:
echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -sc) contrib" | sudo tee /etc/apt/sources.list.d/virtualbox.list
wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
sudo apt-get update
sudo apt-get install dkms virtualbox-4.2
Troubleshooting
For users having problems enabling "Guest Additions" with Ubuntu 12.10 running as guest OS, you can simply install these packages manually via the terminal:
sudo apt-get install virtualbox-guest-additions
sudo apt-get install virtualbox-guest-dkms virtualbox-guest-x11 virtualbox-guest-utils
When you finish, reboot the VM (virtual machine). The screen resolution of Ubuntu 12.10 will now change when resizing the VM. Also, open Devices > Shared Clipboard and enable the "Bidirectional" option:
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