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I am getting this error when installing R and did not get it before(was able to download it before but not anymore)

I would appreciate any help as I am new to Ubuntu.

 Failed to fetch http://lib.stat.cmu.edu/R/CRAN/bin/linux/ubuntu/vivid/r-doc-html_3.2.2-1vivid0_all.deb
 Could not resolve 'lib.stat.cmu.edu'
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DNS server might fail to resolve the name lib.stat.cmu.edu. You can try some public DNS like Google's 8.8.8.8 (2001:4860:4860::8888 for IPv6). To do that you can temporarily replace your /etc/resolv.conf with the following:

nameserver 8.8.8.8

To do this execute:

sudo su
mv -v /etc/resolv.conf /etc/resolv.conf.bak
echo "nameserver 8.8.8.8" > /etc/resolv.conf

To restore your original /etc/resolv.conf after the testing do:

sudo mv -vf /etc/resolv.conf.bak /etc/resolv.conf

For longer term, you can append Google's DNS to your set of nameservers by:

sudo su
echo "nameserver 8.8.8.8" >> /etc/resolv.conf
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  • Ok thank you, but how do you replace this exactly..... I am very new with coding in the terminal.
    – Pete Chernek
    Nov 26, 2015 at 5:26
  • @PeteChernek: I've updated the answer
    – psprint
    Nov 26, 2015 at 5:38
  • I tried it but still getting the same error when installing R
    – Pete Chernek
    Nov 26, 2015 at 5:58
  • @PeteChernek: that's weird, for me "host lib.stat.cmu.edu" works fine on 8.8.8.8 and on my default DNS server, so it's not that the site is down. Does this command work for you?
    – psprint
    Nov 26, 2015 at 6:07
  • pete2323@sc-8560w:~$ host lib.stat.cmu.edu lib.stat.cmu.edu is an alias for FRET.stat.cmu.edu. FRET.stat.cmu.edu mail is handled by 10 TEMPER.stat.cmu.edu.
    – Pete Chernek
    Nov 26, 2015 at 6:14

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