How to Fix ‘Requires installation of untrusted packages’ error in Ubuntu 10.10 Maverick Meerkat

When I try to update my Ubuntu machine, I get an error message "Requires installation packages unstrusted 'and can not figure out why. I later found out that I have lost several key GPG.  
The error screen below is what you’ll get when you try to update your system via Update  Manager or Ubuntu Software center.

If you get the above message while trying to install an application through Ubuntu Software Center (on Ubuntu 10.10 Maverick Meerkat) try the following to fix it:


To fix it, go to Applications –> Accessories’ –> Terminal. and run the command below:

sudo apt-get update

Then take notes of all the numbers (keys) after ‘NO_PUBKEY’. I have underlined my missing keys in the image above.

To install the missing public keys, run the command below for each missing key. Replace XXXXXX with the key shown

sudo apt-key adv --recv-key --keyserver keyserver.ubuntu.com XXXXXXXXX

After that, type the command below to update your package repository with the missing key:

sudo apt-get update

Next, try updating your system again, and this time it should work.

Please ask if you have a problem. Thanks for reading and please come back soon.
Don't forget to leave your comment.

12 Reasons to Try Ubuntu 10.10 Now

As Ubuntu 10.10, or "Maverick Meerkat," hits the streets this Sunday, it's a pretty safe bet that legions of existing Ubuntu users will be updating to the new release. After all, it looks to be Canonical's most user-friendly Ubuntu Linux yet, and many of the new features promise to be must-haves.

For those in the business world who haven't yet tried Ubuntu, however, the reasons to download and give it a whirl are even more compelling. Here are just a few of them.

1. Speed
Ubuntu 10.10 is fast -- darn fast. Even the beta version could boot in as little as 7 seconds, according to reports. Who has time to wait around for Windows when there's work to be done?

2. Price
There's no contest on this one, because Ubuntu is free. Pure and simple. No investment whatsoever, unless you want to buy professional support later on.

3. No Commitment
You can try out Ubuntu without changing or affecting anything else on your computer through options like a LiveCD, Live USB, Wubi or virtualization--all of which I've already described elsewhere. In other words, you have nothing to lose.

4. Hardware Compatibility
Ubuntu will play well on just about any machine you might have sitting around, so you could also try it out on a spare one to keep it off your Windows machines altogether--until you decide you can't go back, that is.

5. Ubuntu One
Ubuntu One is the personal cloud service that lets you synchronize your files and notes and then access them from anywhere. You can also consolidate your computer and mobile phone contacts and share documents and pictures with them. On the fun side, you can use Ubuntu One to buy music and get it delivered to the computers of your choice.

6. Windows Compatibility
With Ubuntu 10.10, a beta client for Windows also allows users to integrate their Windows and Ubuntu worlds by accessing files from either platform. You'll never have to worry about being unable to get at your Windows files.

7. Applications
Unlike Windows, Ubuntu comes with key business productivity software for free, including OpenOffice.org. Firefox is included, but there's also support for both Flash and Google Chrome. Anything that's not there already, meanwhile, can be found in Ubuntu's Software Center. Whereas finding new software on Windows is very much a hunt-and-peck process, with lots of time spent on Google--and your credit card--the Software Center gives you a central place to find and download thousands of open source applications--for free--in a matter of seconds.

8. Security
Ubuntu--and pretty much every distribution of Linux--is extremely secure, particularly compared with Mac OS X and Windows. No wonder experts have recommended using Linux for online banking, in particular--the others just aren't secure enough.

9. Multitouch
If you try the Netbook Edition of Ubuntu on a supported netbook, you'll be able to see for yourself the brand-new multitouch features in Maverick's new Unity interface.

10. Beauty
One key emphasis in the new Ubuntu is making it more beautiful and aesthetically pleasing to use. The Unity interface is part of that in the Netbook Edition, and the Ubuntu Font Family is another part. It's all just nice to look at.

11. It's Sociable
Ubuntu's new "Me Menu" lets you access your Facebook and Twitter accounts straight from the desktop. You can connect to all your favorite chat channels and make updates through a single window.

12. It's Linux
There are so many reasons for businesses to use Linux today, it's hard to keep track of them all. Security is one, of course, but there are also many other reasons Ubuntu, in particular, has become such a good business choice--far better than Mac OS X or Windows.
Ubuntu 10.10 will be available for download starting on Sunday from Canonical's Ubuntu site. Of course, if you can't wait until then, there's always the Release Candidate, which is ripe for the picking right now. Either way, my bet is that once you try Ubuntu for your business, you're going to want to keep it.

Various Advantages Ubuntu

3D Interface

One of the proud by Microsoft in Windows Vista is its new interface, Aero. Unfortunately, the Aero can create a high specification computer to run slowly. Laptops with 2 GB of memory will also slow. This is because Windows Vista requires a higher hardware specification.

Actually before Windows Vista was released, Ubuntu has been able to display the 3D interface. In the version of Ubuntu 7.04, many people who say that the interface Ubuntu (Beryl) are even more captivating than Aero - and only requires specification of the computer that is not too high.

Compatibility

Ubuntu is compatible with almost all of the latest hardware. For a complete list of what hardware is supported by Ubuntu, please visit https: / / wiki.ubuntu.com / HardwareSupport. On that page, you can see a table containing data of a hardware compatibility of Ubuntu.

Many people are surprised to find that Ubuntu can find all the existing hardware their computer automatically and configure it so it's ready to use. Even the various W-LAN ccard, which is rarely recognized, is now automatically detected. With a relatively quick update, Ubuntu is ready to support hardware, new hardware on the market. Small patch provided periodically either officially or from third parties will always be provided to assist the Ubuntu compatibility with current hardware.

Ease of Migration

Since the version of Ubuntu 7.04, Ubuntu has included a Migration Tool. This feature has become the default tool. Utility will help you move your data from Windows to Ubuntu very easily.

Also, Ubuntu also provides a special website with the address https:// help.ubuntu.com/community/Switching ToUbuntu. On this page contained an article that helps you in doing the migration, both from Windows Mac OS, as well as from other Linux distributions. On this page, you can also see applications in Ubuntu equivalent for popular applications commonly used in Windows and Mac OS.

Linux Advance

Although simple at first, Ubuntu also can be configured to be very sophisticated. In the process of installing a program, Ubuntu has a little different than Windows. Ubuntu, like Debian, use the package management system based on 'Apt' (Advanced Packaging Tool). Apt is the package management system that allows the user to manage the software. Apt will make automation in pengabilan, configuration, and installation of a software package.

In general, the software packages in Ubuntu is taken from a container provider of software called "Repository". In general, Ubuntu Repository contains a library software provided on a particular server installation For ent, Apt will download the required files from a repository, configure it according to the system, then install it on the user's computer. With this system, users need not bother anymore in installing a software wants. Automation is becoming one of the Ubuntu attraction.

For those familiar with the SUS (Software Update Service) and WSUS (Windows Software Update Service) from Microsoft, Apt has almost all the capabilities of SUS - and so much more. Not only that, Apt has existed long before the SUS that has proven very reliable and efficient.

For treatment of servers and desktops in large numbers, Apt really help you save time and energy. The process is user-friendly administration would ease the burden of managing an IT Support Ubuntu-based computers.

With tens of thousands of libraries softwaregratis available in his repository and Debian-based distro that is very flexible, Ubuntu is ready to become whatever you want. Multimedia studios, advanced Unix servers, central server computing, render farms, workstations develoment, and others, most likely Ubuntu can do it. Even Google was using Ubuntu in the office.

Easily Found

Ubuntu can be obtained in various ways. You can download it directly from various locations around the world (including Indonesia), order free through http://shipit.com, or order from various Linux distributors in Indonesia. For more details please see the box "Ubuntu Web site."

Less Is More

Ubuntu is actually the biggest advantages is its simplicity. At one company ever made a eksperimmen: one floor of offices migrated to Ubuntu on Sunday secretly. On Monday morning, on the floor of the office staff found that their computer has changed from Windows into Ubuntu all.

The team from the IT department that has been prepared to help them be surprised when it turns out they were not ringing telephone. Even more surprised to find that the staff have returned to work as usual!

This is a remarkable testimony to feature user-friendliness of Ubuntu. Imagine an ordinary computer users can continue to work with Ubuntu in a short time, after years of only using the Windows operating system.

In fact, they are even more happy and comfortable now that they no longer experience the problems caused by viruses and spyware. Now, they can do their work quietly without interruption again.

Much Much More

Advantages offered by the Ubuntu distro is not only up there alone. There are many more. Each person can get a different impression to others about Ubuntu. What impression would you get from Ubuntu? Please try and find your own.

Install OpenOffice 3.2.1 in Ubuntu 10.10

OpenOffice 3.2.1 has been out for about a month now. It has various improvements over the previous version like faster startup time, support for open standards like ODF and better compatibility with Microsoft Office 2010.

Although it has been out for more than a month, it is still not (and probably never be) available in the official repository for Ubuntu 10.10 Maverick Meerkat. As OpenOffice.org makes the source available at the time of the release, it is possible to install it using the source right at the time of release in Ubuntu Maverick Meerkat as well. However, installing from source cannot exactly be called user friendly and you will not get updates if you installed from the source. So, even if you had installed it from source earlier, it is recommended that you install it with this method.

Step 1. Download and Install OpenOffice 3.2.1

We should first download and install OpenOffice 3.2.1, which is in Software you'll need option of this tutorial. Extract file to your desktop to finish the installation.

Step 2. Remove The Existing Eersion

You can remove the existing version of OpenOffice if you wish with this command:

sudo apt-get remove openoffice*.*

Step 3. Install New OpenOffice

Copy and paste OOO320_m18_native_packed-1_en-US.9502 onto the desktop then open Terminal and paste this command:

sudo dpkg -i ~/Desktop/OOO320_m18_native_packed-1_en-US.9502/DEBS/*.deb

Step 4. Install OpenOffice Menus

Then paste this command:

sudo dpkg -i ~/Desktop/OOO320_m18_native_packed-1_en-US.9502/DEBS/desktop-integration/openoffice.org3.2-debian-menus_3.2-9502_all.deb

Once you’ve done that you’ll find OpenOffice 3.2.1 in Office.

how to install printer drivers Canon iP1980 in Ubuntu 10.10

Install the package libcupsys2 first before installing iP1900 printer driver. Libcupsys2 package can be downloaded from here. then install as usual through the debian installer (double click).

Then:

download driver canon for linux here
after that:

1. extract iP1900_debian_printer.tar to the folder with the name iP1900_debian_printer and put on home folders
2. open terminal, type
3. $ cd iP1900_debian_printer/
4. continue to type anymore
5. sudo dpkg -i *.deb
6. wait until completion, continue to type:
7. sudo apt-get -f install
8. completed

Hopefully useful ..

Customizing dual-boot setup UBUNTU 10.10

If you use duel operating system, same as UBUNTU 10.10 and WINDOWS 7, when your Ubuntu system boots, you will see the GRUB menu if you hit the Esc key, or if you’ve enabled the menu to show by default. The only issue with this is that the default timeout is only 10 seconds. You may want to increase this amount… or you may even want to decrease it. There are several ways that can be used, one of which is to edit the Ubuntu boot menu.

1. Press Applications → Accessories → Terminal.
2. The Terminal screen will appear. Type the following into the Terminal, entering your administrative password if prompted: 

   cd /boot/grub
   sudo cp grub.cfg menu_backup.cfg
   sudo gedit grub.cfg

3. The Text Editor will start, and will open the file grub.cfg 
4. Find the part of the file which contains text similar to the following:

   insmod gettext
   if [ "${recordfail}" = 1 ]; then
     set timeout=-1
   else
     set timeout=10

   fi
   ### END /etc/grub.d/00_header ###

5. The line beginning with the word timeout determines the time, in seconds, which the boot menu will be shown for. Change the number on this line to the number of seconds which you would like the menu to be shown for. Use 0 if you would not like the menu to be shown at all.
6. Press File → Save to save your changes and close the Text Editor. Your changes should take effect the next time you restart your computer.

The timeout value is in seconds. Save the file, and when you reboot you will have that many seconds to choose the menu item you want.