I can't install synaptic package manager in Ubuntu 16.04.
I do this:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install synaptic

And I see

Package synaptic is not available, but is referred to by another package. 
This may mean that the package is missing, has been obsoleted, or is only 
available from another source 
E: Package 'synaptic' has no installation candidate

What can I do?

The output of sudo apt update command:

Hit:1 http://archive.canonical.com xenial InRelease
Hit:2 http://archive.canonical.com/ubuntu xenial InRelease
Reading package lists... Done                      
Building dependency tree       
Reading state information... Done
All packages are up to date.
  • Are you running a LiveUSB? Are you connected to the internet? – Pilot6 Jan 22 '17 at 10:27
  • i've downloaded ubuntu with liveUSB, but i dnt know how to download synaptic via LiveUSB... – Kate Buchynska Jan 22 '17 at 10:32
  • Did you install the system, or just run it from Live USB? – Pilot6 Jan 22 '17 at 10:32
  • system is installed on computer. – Kate Buchynska Jan 22 '17 at 10:33
  • Please edit your question and post the output of sudo apt update command. – Pilot6 Jan 22 '17 at 10:34

Go to System Settings -> Software and Updates and check the "universe" repository.

You can also enable "multiverse" and "restricted" too.

Then the package will get installed after sudo apt update.

Normally these repositories are enabled by default in installed systems, but are disabled in Live systems. In your case the repositries are not enabled for some reason.

| improve this answer | |
  • ok, i do this, and what next? how now i can install synaptic, by typing sudo apt-get install synaptic ? – Kate Buchynska Jan 22 '17 at 10:45
  • Next install synaptic by sudo apt install synaptic. – Pilot6 Jan 22 '17 at 10:46
  • Did you install synaptic successfully? If yes, then please accept this answer by clicking the check sign at the left. Regarding Skype you can ask another question, or find a solution yourself. Tip: you will need to enable "Canonical Partners" repository on "Other Software" tab. – Pilot6 Jan 22 '17 at 11:01
  • @KateBuchynska I just answered about Skype. – Pilot6 Jan 22 '17 at 11:02

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