title: I am not able to install opencv in ubuntu 13.10 and i have mentioned the error i am getting below
body: <p>After giving that command i am getting this... what should i do? this is the first step for creating developer environment. can anyone please give a step by step instruction for installing opencv in ubuntu 13.10 please. </p>
  
  <pre><code>ammu@ubuntu:~$ sudo apt-get update
  
  
  
  
  
  
  Err http://us.archive.ubuntu.com saucy InRelease                            
  
  Err http://us.archive.ubuntu.com saucy-updates InRelease                    
  
  Err http://us.archive.ubuntu.com saucy-backports InRelease
  
  Err http://us.archive.ubuntu.com saucy Release.gpg
    Could not resolve 'us.archive.ubuntu.com'
  Err http://us.archive.ubuntu.com saucy-updates Release.gpg
    Could not resolve 'us.archive.ubuntu.com'
  Err http://us.archive.ubuntu.com saucy-backports Release.gpg
    Could not resolve 'us.archive.ubuntu.com'
  Err http://security.ubuntu.com saucy-security InRelease
  
  Err http://security.ubuntu.com saucy-security Release.gpg
    Could not resolve 'security.ubuntu.com'
  Reading package lists... Done
  W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/InRelease  
  
  W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/InRelease  
  
  W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/InRelease  
  
  W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/InRelease  
  
  W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/Release.gpg  Could not resolve 'us.archive.ubuntu.com'
  
  W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/Release.gpg  Could not resolve 'us.archive.ubuntu.com'
  
  W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/Release.gpg  Could not resolve 'us.archive.ubuntu.com'
  
  W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/Release.gpg  Could not resolve 'security.ubuntu.com'
  
  W: Some index files failed to download. They have been ignored, or old ones used instead.
  </code></pre>
  
  <p>and while giving the below mentioned command am getting the following error what should i do?</p>
  
  <pre><code>ammu@ubuntu:~$ sudo apt-get install cmake
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Package cmake 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 'cmake' has no installation candidate
  </code></pre>