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I tried to install gfortran by writing sudo apt-get install gfortran but the terminal simply showed 

Enable to locate the packages for gfortran

So I again tried by writing 

sudo apt-get update

and it gives error.

Error is as shown below:

Err:65 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

Can anybody suggest what I should do?

Zanna
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Kavita Rani
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  • xenial-backports why do you have that repository? – Rinzwind Sep 12 '16 at 10:19
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    Well since I am using ubuntu for the first time. I dont know that much. May be because I was trying to install by reading it from here and there only, I did something unintentionally. Could you please suggest something to overcome this problem? – Kavita Rani Sep 12 '16 at 10:25

1 Answers1

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apt-cache policy gfortran reveals that it is available in main Ubuntu repository. And since this error is about backport repository, you can safely ignore this. Proceed with

sudo apt-get install gfortran

To install the package.

Check this AU question to know about backport repository

Community
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Anwar
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