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root@PC:~# sudo apt-get update sudo: unable to resolve host PC

Err http://mirror.learn.ac.lk trusty Release.gpg Unable to connect to 192.168.1.100:8888: Err http://mirror.learn.ac.lk trusty-updates Release.gpg Unable to connect to 192.168.1.100:8888:

Reading package lists... Done

W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release.gpg Unable to connect to 192.168.1.100:8888:

W: Some index files failed to download. They have been ignored, or old ones used instead

  • 2
    Sounds like there's a proxy in use on your system, and that proxy is down or unreachable. – Thomas Ward Jul 1 '18 at 16:49
  • You need not use sudo at a root prompt. – user535733 Jul 1 '18 at 18:04
  • ok , thank you very much friend, it's work – Ruwan Keerthi Jul 7 '18 at 8:46

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