<div dir="ltr">Καλησπέρα,<div>όταν εκτελώ την εντολή $ sudo apt-get install libbz2-dev libsqlite3-dev libboost-dev zlib1g-dev μου βγαίνει το εξής error:</div><div><br></div><div>Err:1 <a href="http://ppa.launchpad.net/x2go/stable/ubuntu">http://ppa.launchpad.net/x2go/stable/ubuntu</a> xenial InRelease</div><div>  Could not resolve &#39;<a href="http://ppa.launchpad.net">ppa.launchpad.net</a>&#39;</div><div>Err:2 <a href="http://gr.archive.ubuntu.com/ubuntu">http://gr.archive.ubuntu.com/ubuntu</a> xenial InRelease                                           </div><div>  Could not resolve &#39;<a href="http://gr.archive.ubuntu.com">gr.archive.ubuntu.com</a>&#39;</div><div>Err:3 <a href="http://gr.archive.ubuntu.com/ubuntu">http://gr.archive.ubuntu.com/ubuntu</a> xenial-updates InRelease                                   </div><div>  Could not resolve &#39;<a href="http://gr.archive.ubuntu.com">gr.archive.ubuntu.com</a>&#39;</div><div>Err:4 <a href="http://gr.archive.ubuntu.com/ubuntu">http://gr.archive.ubuntu.com/ubuntu</a> xenial-backports InRelease</div><div>  Could not resolve &#39;<a href="http://gr.archive.ubuntu.com">gr.archive.ubuntu.com</a>&#39;</div><div>Hit:5 <a href="http://security.ubuntu.com/ubuntu">http://security.ubuntu.com/ubuntu</a> xenial-security InRelease</div><div>Reading package lists... Done                                  </div><div>W: Failed to fetch <a href="http://gr.archive.ubuntu.com/ubuntu/dists/xenial/InRelease">http://gr.archive.ubuntu.com/ubuntu/dists/xenial/InRelease</a>  Could not resolve &#39;<a href="http://gr.archive.ubuntu.com">gr.archive.ubuntu.com</a>&#39;</div><div>W: Failed to fetch <a href="http://gr.archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease">http://gr.archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease</a>  Could not resolve &#39;<a href="http://gr.archive.ubuntu.com">gr.archive.ubuntu.com</a>&#39;</div><div>W: Failed to fetch <a href="http://gr.archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease">http://gr.archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease</a>  Could not resolve &#39;<a href="http://gr.archive.ubuntu.com">gr.archive.ubuntu.com</a>&#39;</div><div>W: Failed to fetch <a href="http://ppa.launchpad.net/x2go/stable/ubuntu/dists/xenial/InRelease">http://ppa.launchpad.net/x2go/stable/ubuntu/dists/xenial/InRelease</a>  Could not resolve &#39;<a href="http://ppa.launchpad.net">ppa.launchpad.net</a>&#39;</div><div>W: Some index files failed to download. They have been ignored, or old ones used instead.</div><div><br></div><div>σε τι οφείλεται αυτό και πώς μπορώ να το διορθώσω; </div><div>Ευχαριστώ</div></div>