sudo apt-get update fail on Ubuntu 17.04 - linux

Question

While running the sudo apt-get update on ubuntu 17.04 Zesty Zapus, I am getting the following error. I have posted on the error lines. I wanted to install python libraries like matplotlib and tkinter which failed to installed because above command wasn't running succesfully. Please suggest me what to do.
Err:9 http://security.ubuntu.com/ubuntu zesty-security/main amd64 Packages
404 Not Found [IP: 2001:67c:1560:8001::14 80]
Err:25 http://in.archive.ubuntu.com/ubuntu zesty/main i386 Packages
404 Not Found [IP: 2001:67c:1360:8001::21 80]
Err:81 http://in.archive.ubuntu.com/ubuntu zesty-updates/main amd64 Packages
404 Not Found [IP: 2001:67c:1360:8001::21 80]
Err:113 http://in.archive.ubuntu.com/ubuntu zesty-backports/main amd64 Packages
404 Not Found [IP: 2001:67c:1360:8001::21 80]
Reading package lists... Done
W: The repository 'http://security.ubuntu.com/ubuntu zesty-security Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://in.archive.ubuntu.com/ubuntu zesty Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://in.archive.ubuntu.com/ubuntu zesty-updates Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: The repository 'http://in.archive.ubuntu.com/ubuntu zesty-backports Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/zesty-security/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1560:8001::14 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/zesty/main/binary-i386/Packages 404 Not Found [IP: 2001:67c:1360:8001::21 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/zesty-updates/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1360:8001::21 80]
E: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/zesty-backports/main/binary-amd64/Packages 404 Not Found [IP: 2001:67c:1360:8001::21 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

Answer 1

you can solve it by: just replace us.archive.ubuntu.com and security.ubuntu.com in /etc/apt/sources.list with old-releases.ubuntu.com and then you'll be able to finish updating.
refer to source 1 and ubuntu forum
it work for me

Answer 2

In my case:
sed -e 's/archive.ubuntu.com/old-releases.ubuntu.com/g' -i /etc/apt/sources.list
sed -e 's/security.ubuntu.com/old-releases.ubuntu.com/g' -i /etc/apt/sources.list

Answer 3

In my case, I was able to download some of the packages by doing the following:
I had to replace "us.archive.ubuntu.com" and "security.ubuntu.com" in /etc/apt/sources.list WITH "old-releases.ubuntu.com" and then I was able to finish downloading some of the packages, like Ayush Kumar said.
For the other updates that were listed by my Hosting company, Linode, I used the following:
I had to use the --allow-unauthenticated flag with sudo apt-get update.
sudo apt-get update --allow-unauthenticated
Then I was able to finish updating.

Answer 4

17.04 isn't getting further support from Ubuntu. So, the solution that worked for me was to upgrade it to 17.10 as none other solutions helped.