I am very newby on ubuntu so I will try to explain my problem in a silly way :)
I had 12.04 untill today in my second partition and I decided to run it. Then I upgrade it to 14.04 (just finished). However, when I try to run skype it returned me error. When I check details, I saw the "not installed" message. But I was able to use it before. And just before the upgrading I was surfing with chrome. Now I can't run it either. I click it and nothing happens. I checked the "installed apps" in the software center, I can't see both of them. But, for instance, I still have my .skype directory under the /home. Even I see the diretory with my skype username out there.
Maybe there are also another apps in the same situation. So, What is going on? What I have to do? Give me some cool console commands :p
EDIT: I also see these messages when I use sudo apt-get ....
command. (I tried to translate it from my own language:
N: In the '/etc/apt/sources.list.d/' directory 'google-chrome.list.save' file is an invalid file extension, so it is ignored.
N: In the '/etc/apt/sources.list.d/' directory 'ubuntu-toolchain-r-test-precise.list.distUpgrade' file is an invalid file extension, so it is ignored.
N: In the '/etc/apt/sources.list.d/' directory 'google-chrome.list.distUpgrade' file is an invalid file extension, so it is ignored.
N: In the '/etc/apt/sources.list.d/' directory 'google-chrome.list.save' file is an invalid file extension, so it is ignored.
N: In the '/etc/apt/sources.list.d/' directory 'ubuntu-toolchain-r-test-precise.list.distUpgrade' file is an invalid file extension, so it is ignored.
N: ın the '/etc/apt/sources.list.d/' directory 'google-chrome.list.distUpgrade' file is an invalid file extension, so it is ignored.
And this, I got this after trying Skype again:
E: 'skype:i386' packet has no candidate version, so candidate version cannot be chosen