Today I am trying to install Skype on my Ubuntu 10.10 (Maverick), it gives me the error like "Requires installation of untrusted packages" even though I install from Ubuntu Software Center which I assume everything there should be authenticated and have trusted Key.
When I googled on the web, people suggested two ways to fix this.
1) Open a terminal, and then use "sudo apt-get install YOUR_PACKAGE" or download deb file from somewhere.
2) Run "sudo apt-get update" in the console and then fetch the package from Ubuntu Software Center.
Monday, 12 March 2012
Sometimes Ubuntu just lost the sound for some reason
Sometimes, you might lost the sound output in Ubuntu. One way is worth to try is to open the sound management from System-> Preferences, and then choose analog output as a connector in the output menu.
Sunday, 11 March 2012
How to solve GPG error when you run apt-get update your source list?
In computers based on a Debian operating system that uses Linux kernel, error messages may come up like 'NO_PUBKEY'.This happens while using the Apt-Get command line tool and this error is associated with the tool's update feature. The new feature in the Apt-Get package management toolguarantees the authenticity of the server before updating the Debian OS. That's why the error 'NO_PUBKEY' pops up. This problem can be solved by keying in the appropriate commands.
Here I found a really helpful solution from this link.
When you add a repository in your /etc/apt/sources.list and run a apt-update you'll get the update of the newly added repository but also a warning about a GPG key like the following one:
Running again apt-update won't solve the issue.
This warning can be safely ignored, but I don't like to leave warning when there is a solution to get rid of it... because when something is going wrong, it would complicate to sort out what is safe to be ignored and what tells about a real issue.
So, to get rid of this warning here is the two command you need to execute :
which will give this output :
Here I found a really helpful solution from this link.
When you add a repository in your /etc/apt/sources.list and run a apt-update you'll get the update of the newly added repository but also a warning about a GPG key like the following one:
Hit http://ppa.launchpad.net intrepid/main Sources Hit http://fr.archive.ubuntu.com intrepid-proposed/universe Packages Hit http://ppa.launchpad.net intrepid/main Packages Fetched 309B in 0s (519B/s) Reading package lists... Done W: GPG error: http://ppa.launchpad.net intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY D702BF6B8C6C1EFD
Running again apt-update won't solve the issue.
This warning can be safely ignored, but I don't like to leave warning when there is a solution to get rid of it... because when something is going wrong, it would complicate to sort out what is safe to be ignored and what tells about a real issue.
So, to get rid of this warning here is the two command you need to execute :
gpg --keyserver subkeys.pgp.net --recv D702BF6B8C6C1EFD gpg --export --armor D702BF6B8C6C1EFD | sudo apt-key add - sudo apt-get update
which will give this output :
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